http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/ComponentsInstallationCheck.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/ComponentsInstallationCheck.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/ComponentsInstallationCheck.java
index 3517537..455a92d 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/ComponentsInstallationCheck.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/ComponentsInstallationCheck.java
@@ -18,7 +18,6 @@
 package org.apache.ambari.server.checks;
 
 import java.text.MessageFormat;
-import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.LinkedHashSet;
 import java.util.List;

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/ConfigurationMergeCheck.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/ConfigurationMergeCheck.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/ConfigurationMergeCheck.java
index a47512e..dd1385b 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/ConfigurationMergeCheck.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/ConfigurationMergeCheck.java
@@ -25,7 +25,6 @@ import java.util.Set;
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.controller.PrereqCheckRequest;
 import org.apache.ambari.server.orm.entities.RepositoryVersionEntity;
-import org.apache.ambari.server.state.Cluster;
 import org.apache.ambari.server.state.ConfigMergeHelper;
 import org.apache.ambari.server.state.ConfigMergeHelper.ThreeWayValue;
 import org.apache.ambari.server.state.stack.PrereqCheckStatus;

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/HardcodedStackVersionPropertiesCheck.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/HardcodedStackVersionPropertiesCheck.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/HardcodedStackVersionPropertiesCheck.java
index 4dfc8e9..11d6676 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/HardcodedStackVersionPropertiesCheck.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/HardcodedStackVersionPropertiesCheck.java
@@ -17,9 +17,14 @@
  */
 package org.apache.ambari.server.checks;
 
-import com.google.inject.Inject;
-import com.google.inject.Provider;
-import com.google.inject.Singleton;
+import java.util.HashSet;
+import java.util.LinkedHashSet;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.controller.PrereqCheckRequest;
 import org.apache.ambari.server.orm.entities.RepositoryVersionEntity;
@@ -27,23 +32,13 @@ import org.apache.ambari.server.state.Cluster;
 import org.apache.ambari.server.state.Clusters;
 import org.apache.ambari.server.state.Config;
 import org.apache.ambari.server.state.ConfigHelper;
-import org.apache.ambari.server.state.ConfigMergeHelper;
-import org.apache.ambari.server.state.ConfigMergeHelper.ThreeWayValue;
 import org.apache.ambari.server.state.DesiredConfig;
 import org.apache.ambari.server.state.stack.PrereqCheckStatus;
 import org.apache.ambari.server.state.stack.PrerequisiteCheck;
-import org.apache.commons.lang.StringUtils;
 
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.LinkedHashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Set;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
+import com.google.inject.Inject;
+import com.google.inject.Provider;
+import com.google.inject.Singleton;
 
 /**
  * Checks for properties that contain hardcoded CURRENT hdp version string.

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/HiveDynamicServiceDiscoveryCheck.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/HiveDynamicServiceDiscoveryCheck.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/HiveDynamicServiceDiscoveryCheck.java
index 77a85b9..6289ff5 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/HiveDynamicServiceDiscoveryCheck.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/HiveDynamicServiceDiscoveryCheck.java
@@ -24,8 +24,6 @@ import java.util.Map;
 
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.controller.PrereqCheckRequest;
-import org.apache.ambari.server.state.Cluster;
-import org.apache.ambari.server.state.Service;
 import org.apache.ambari.server.state.stack.PrereqCheckStatus;
 import org.apache.ambari.server.state.stack.PrerequisiteCheck;
 import 
org.apache.ambari.server.state.stack.UpgradePack.PrerequisiteCheckConfig;

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/MapReduce2JobHistoryStatePreservingCheck.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/MapReduce2JobHistoryStatePreservingCheck.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/MapReduce2JobHistoryStatePreservingCheck.java
index 06ca162..31e3df8 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/MapReduce2JobHistoryStatePreservingCheck.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/MapReduce2JobHistoryStatePreservingCheck.java
@@ -17,21 +17,17 @@
  */
 package org.apache.ambari.server.checks;
 
-import com.google.inject.Singleton;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.controller.PrereqCheckRequest;
-import org.apache.ambari.server.state.Cluster;
-import org.apache.ambari.server.state.Service;
 import org.apache.ambari.server.state.stack.PrereqCheckStatus;
 import org.apache.ambari.server.state.stack.PrerequisiteCheck;
-import 
org.apache.ambari.server.state.stack.UpgradePack.PrerequisiteCheckConfig;
-import org.apache.ambari.server.utils.VersionUtils;
 import org.apache.commons.lang.StringUtils;
 
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-import java.util.Map;
+import com.google.inject.Singleton;
 
 /**
  * The {@link MapReduce2JobHistoryStatePreservingCheck}

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/MpackInstallChecker.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/MpackInstallChecker.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/MpackInstallChecker.java
index d80f123..d471c1f 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/MpackInstallChecker.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/MpackInstallChecker.java
@@ -17,10 +17,14 @@
  */
 package org.apache.ambari.server.checks;
 
-import com.google.inject.Guice;
-import com.google.inject.Inject;
-import com.google.inject.Injector;
-import com.google.inject.persist.PersistService;
+import java.sql.Connection;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
 
 import org.apache.ambari.server.audit.AuditLoggerModule;
 import org.apache.ambari.server.controller.ControllerModule;
@@ -34,14 +38,10 @@ import org.apache.commons.cli.Options;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.sql.Connection;
-import java.sql.ResultSet;
-import java.sql.SQLException;
-import java.sql.Statement;
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Map;
+import com.google.inject.Guice;
+import com.google.inject.Inject;
+import com.google.inject.Injector;
+import com.google.inject.persist.PersistService;
 
 
 /**

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/PreviousUpgradeCompleted.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/PreviousUpgradeCompleted.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/PreviousUpgradeCompleted.java
index 3a4467f..a77ad9f 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/PreviousUpgradeCompleted.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/PreviousUpgradeCompleted.java
@@ -17,35 +17,27 @@
  */
 package org.apache.ambari.server.checks;
 
-import com.google.inject.Inject;
-import com.google.inject.Singleton;
+import java.text.MessageFormat;
+import java.util.LinkedHashSet;
+import java.util.List;
+
+import javax.inject.Provider;
+
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.actionmanager.HostRoleStatus;
 import org.apache.ambari.server.controller.PrereqCheckRequest;
 import org.apache.ambari.server.orm.dao.HostRoleCommandDAO;
 import org.apache.ambari.server.orm.dao.RequestDAO;
-import org.apache.ambari.server.orm.entities.ClusterVersionEntity;
 import org.apache.ambari.server.orm.entities.HostRoleCommandEntity;
-import org.apache.ambari.server.orm.entities.HostVersionEntity;
-import org.apache.ambari.server.orm.entities.RepositoryVersionEntity;
 import org.apache.ambari.server.orm.entities.RequestEntity;
 import org.apache.ambari.server.orm.entities.UpgradeEntity;
 import org.apache.ambari.server.state.Cluster;
-import org.apache.ambari.server.state.Host;
-import org.apache.ambari.server.state.MaintenanceState;
-import org.apache.ambari.server.state.RepositoryVersionState;
-import org.apache.ambari.server.state.StackId;
 import org.apache.ambari.server.state.stack.PrereqCheckStatus;
 import org.apache.ambari.server.state.stack.PrerequisiteCheck;
 import org.apache.ambari.server.state.stack.upgrade.Direction;
-import org.apache.commons.lang.StringUtils;
 
-import javax.inject.Provider;
-import java.text.MessageFormat;
-import java.util.HashSet;
-import java.util.LinkedHashSet;
-import java.util.List;
-import java.util.Set;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
 
 /**
  * Checks if Install Packages needs to be re-run

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/SecondaryNamenodeDeletedCheck.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/SecondaryNamenodeDeletedCheck.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/SecondaryNamenodeDeletedCheck.java
index 0dbb1b5..ea2e028 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/SecondaryNamenodeDeletedCheck.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/SecondaryNamenodeDeletedCheck.java
@@ -24,7 +24,6 @@ import java.util.Set;
 
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.ServiceComponentNotFoundException;
-import org.apache.ambari.server.ServiceNotFoundException;
 import org.apache.ambari.server.controller.PrereqCheckRequest;
 import org.apache.ambari.server.orm.dao.HostComponentStateDAO;
 import org.apache.ambari.server.orm.entities.HostComponentStateEntity;

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheck.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheck.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheck.java
index 3970e9e..3bd4f1a 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheck.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheck.java
@@ -23,7 +23,6 @@ import java.util.List;
 import java.util.Map;
 
 import org.apache.ambari.server.AmbariException;
-import org.apache.ambari.server.ServiceNotFoundException;
 import org.apache.ambari.server.controller.PrereqCheckRequest;
 import org.apache.ambari.server.state.Cluster;
 import org.apache.ambari.server.state.Config;

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheck.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheck.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheck.java
index 38a6702..67999e8 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheck.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheck.java
@@ -21,7 +21,6 @@ import java.util.Arrays;
 import java.util.Map;
 
 import org.apache.ambari.server.AmbariException;
-import org.apache.ambari.server.ServiceNotFoundException;
 import org.apache.ambari.server.controller.PrereqCheckRequest;
 import org.apache.ambari.server.state.Cluster;
 import org.apache.ambari.server.state.Config;

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheck.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheck.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheck.java
index 35be754..269de82 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheck.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheck.java
@@ -17,6 +17,8 @@
  */
 package org.apache.ambari.server.checks;
 
+import java.util.Arrays;
+
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.controller.PrereqCheckRequest;
 import org.apache.ambari.server.state.Cluster;
@@ -26,9 +28,6 @@ import org.apache.ambari.server.state.stack.PrerequisiteCheck;
 
 import com.google.inject.Singleton;
 
-import java.util.Arrays;
-import java.util.Map;
-
 /**
  * Checks that namenode high availability is enabled.
  */

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheck.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheck.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheck.java
index 5dadcdd..4b2e796 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheck.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheck.java
@@ -23,7 +23,6 @@ import java.util.List;
 import java.util.Map;
 
 import org.apache.ambari.server.AmbariException;
-import org.apache.ambari.server.ServiceNotFoundException;
 import org.apache.ambari.server.controller.PrereqCheckRequest;
 import org.apache.ambari.server.state.Cluster;
 import org.apache.ambari.server.state.Config;

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheck.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheck.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheck.java
index 77605c1..8c73fa9 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheck.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheck.java
@@ -17,18 +17,16 @@
  */
 package org.apache.ambari.server.checks;
 
+import java.util.Arrays;
+
 import org.apache.ambari.server.AmbariException;
-import org.apache.ambari.server.ServiceNotFoundException;
 import org.apache.ambari.server.controller.PrereqCheckRequest;
-import org.apache.ambari.server.state.Cluster;
 import org.apache.ambari.server.state.stack.PrereqCheckStatus;
 import org.apache.ambari.server.state.stack.PrerequisiteCheck;
 import org.apache.commons.lang.BooleanUtils;
 
 import com.google.inject.Singleton;
 
-import java.util.Arrays;
-
 /**
  * Checks that YARN has work-preserving restart enabled.
  */

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/StormRestAPIDeletedCheck.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/StormRestAPIDeletedCheck.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/StormRestAPIDeletedCheck.java
index 7071681..90eea97 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/StormRestAPIDeletedCheck.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/StormRestAPIDeletedCheck.java
@@ -17,8 +17,11 @@
  */
 package org.apache.ambari.server.checks;
 
-import com.google.inject.Inject;
-import com.google.inject.Singleton;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.ServiceComponentNotFoundException;
 import org.apache.ambari.server.ServiceNotFoundException;
@@ -30,10 +33,8 @@ import org.apache.ambari.server.state.ServiceComponent;
 import org.apache.ambari.server.state.stack.PrereqCheckStatus;
 import org.apache.ambari.server.state.stack.PrerequisiteCheck;
 
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Set;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
 
 /**
  * The {@link StormRestAPIDeletedCheck}

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/UpgradeCheckRegistry.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/UpgradeCheckRegistry.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/UpgradeCheckRegistry.java
index cecf6c5..b770dd5 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/UpgradeCheckRegistry.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/UpgradeCheckRegistry.java
@@ -28,14 +28,14 @@ import java.util.Map;
 import java.util.Set;
 import java.util.TreeSet;
 
-import com.google.inject.Singleton;
-
 import org.apache.ambari.server.state.ServiceInfo;
 import org.apache.ambari.server.state.stack.UpgradePack;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.util.ClassUtils;
 
+import com.google.inject.Singleton;
+
 /**
  * The {@link UpgradeCheckRegistry} contains the ordered list of all 
pre-upgrade
  * checks. This will order the checks according to

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/VersionMismatchCheck.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/VersionMismatchCheck.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/VersionMismatchCheck.java
index 2caa69b..050d43e 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/VersionMismatchCheck.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/VersionMismatchCheck.java
@@ -17,7 +17,10 @@
  */
 package org.apache.ambari.server.checks;
 
-import com.google.inject.Singleton;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.controller.PrereqCheckRequest;
 import org.apache.ambari.server.state.Cluster;
@@ -29,9 +32,7 @@ import org.apache.ambari.server.state.stack.PrereqCheckStatus;
 import org.apache.ambari.server.state.stack.PrerequisiteCheck;
 import org.apache.commons.lang.StringUtils;
 
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Map;
+import com.google.inject.Singleton;
 
 /**
  * Warns about host components whose upgrade state is VERSION_MISMATCH. Never 
triggers

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnRMHighAvailabilityCheck.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnRMHighAvailabilityCheck.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnRMHighAvailabilityCheck.java
index 9dd4877..6206dd3 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnRMHighAvailabilityCheck.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnRMHighAvailabilityCheck.java
@@ -18,12 +18,9 @@
 package org.apache.ambari.server.checks;
 
 import java.util.Arrays;
-import java.util.Map;
 
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.controller.PrereqCheckRequest;
-import org.apache.ambari.server.state.Cluster;
-import org.apache.ambari.server.state.Service;
 import org.apache.ambari.server.state.stack.PrereqCheckStatus;
 import org.apache.ambari.server.state.stack.PrerequisiteCheck;
 import org.apache.commons.lang.BooleanUtils;

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnTimelineServerStatePreservingCheck.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnTimelineServerStatePreservingCheck.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnTimelineServerStatePreservingCheck.java
index 8cb8020..2200a45 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnTimelineServerStatePreservingCheck.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/checks/YarnTimelineServerStatePreservingCheck.java
@@ -23,7 +23,6 @@ import java.util.Map;
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.controller.PrereqCheckRequest;
 import org.apache.ambari.server.state.Cluster;
-import org.apache.ambari.server.state.Service;
 import org.apache.ambari.server.state.stack.PrereqCheckStatus;
 import org.apache.ambari.server.state.stack.PrerequisiteCheck;
 import 
org.apache.ambari.server.state.stack.UpgradePack.PrerequisiteCheckConfig;

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/collections/Predicate.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/Predicate.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/Predicate.java
index 09bc7d5..f7e20dd 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/Predicate.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/Predicate.java
@@ -18,10 +18,10 @@
 
 package org.apache.ambari.server.collections;
 
-import com.google.gson.Gson;
-
 import java.util.Map;
 
+import com.google.gson.Gson;
+
 /**
  * {@link Predicate} wraps {@link org.apache.commons.collections.Predicate} to
  * provide additional functionality like serializing to and from a Map and 
JSON formatted data.

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/collections/PredicateUtils.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/PredicateUtils.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/PredicateUtils.java
index 2a75d81..8461433 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/PredicateUtils.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/PredicateUtils.java
@@ -18,17 +18,18 @@
 
 package org.apache.ambari.server.collections;
 
-import com.google.common.reflect.TypeToken;
-import com.google.gson.Gson;
-import org.apache.ambari.server.collections.functors.PredicateClassFactory;
-import org.apache.commons.lang.StringUtils;
-
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.lang.reflect.Type;
 import java.util.Collections;
 import java.util.Map;
 
+import org.apache.ambari.server.collections.functors.PredicateClassFactory;
+import org.apache.commons.lang.StringUtils;
+
+import com.google.common.reflect.TypeToken;
+import com.google.gson.Gson;
+
 /**
  * PredicateUtils is a utility class providing methods to help perform tasks 
on {@link Predicate}s.
  */

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/AndPredicate.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/AndPredicate.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/AndPredicate.java
index 62a953a..737e540 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/AndPredicate.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/AndPredicate.java
@@ -18,14 +18,14 @@
 
 package org.apache.ambari.server.collections.functors;
 
-import org.apache.ambari.server.collections.PredicateUtils;
-import org.apache.commons.collections.Predicate;
-import org.apache.commons.collections.functors.PredicateDecorator;
-
 import java.util.Collection;
 import java.util.Iterator;
 import java.util.Map;
 
+import org.apache.ambari.server.collections.PredicateUtils;
+import org.apache.commons.collections.Predicate;
+import org.apache.commons.collections.functors.PredicateDecorator;
+
 /**
  * {@link AndPredicate} wraps {@link 
org.apache.commons.collections.functors.AndPredicate} to
  * provide additional functionality like serializing to and from a Map and 
JSON formatted data.

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/ContainsPredicate.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/ContainsPredicate.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/ContainsPredicate.java
index 503405e..a0f18f8 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/ContainsPredicate.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/ContainsPredicate.java
@@ -18,8 +18,6 @@
 
 package org.apache.ambari.server.collections.functors;
 
-import org.apache.ambari.server.collections.Predicate;
-
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
@@ -28,6 +26,8 @@ import java.util.Iterator;
 import java.util.Map;
 import java.util.Set;
 
+import org.apache.ambari.server.collections.Predicate;
+
 /**
  * {@link ContainsPredicate} is a predicate implementation testing whether a 
string value exists
  * within some set of strings.

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/ContextTransformer.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/ContextTransformer.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/ContextTransformer.java
index b20963a..af20eaf 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/ContextTransformer.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/ContextTransformer.java
@@ -18,10 +18,10 @@
 
 package org.apache.ambari.server.collections.functors;
 
-import org.apache.commons.collections.Transformer;
-
 import java.util.Map;
 
+import org.apache.commons.collections.Transformer;
+
 /**
  * {@link ContextTransformer} is a {@link Transformer} implementation that 
traverses a {@link Map}
  * of {@link Map}s to find the value related to the specified key.

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/DelegatedMultiplePredicateContainer.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/DelegatedMultiplePredicateContainer.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/DelegatedMultiplePredicateContainer.java
index b9add7a..dff2403 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/DelegatedMultiplePredicateContainer.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/DelegatedMultiplePredicateContainer.java
@@ -18,14 +18,14 @@
 
 package org.apache.ambari.server.collections.functors;
 
-import org.apache.ambari.server.collections.Predicate;
-import org.apache.commons.collections.functors.PredicateDecorator;
-
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 
+import org.apache.ambari.server.collections.Predicate;
+import org.apache.commons.collections.functors.PredicateDecorator;
+
 /**
  * DelegatedMultiplePredicateContainer is an abstract class providing 
functionality related to
  * managing a delegate used to hold multiple {@link Predicate}s. For example 
<code>and</code> and

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/DelegatedSinglePredicateContainer.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/DelegatedSinglePredicateContainer.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/DelegatedSinglePredicateContainer.java
index 0e800ea..ace4d57 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/DelegatedSinglePredicateContainer.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/DelegatedSinglePredicateContainer.java
@@ -18,12 +18,12 @@
 
 package org.apache.ambari.server.collections.functors;
 
-import org.apache.ambari.server.collections.Predicate;
-import org.apache.commons.collections.functors.PredicateDecorator;
-
 import java.util.Collections;
 import java.util.Map;
 
+import org.apache.ambari.server.collections.Predicate;
+import org.apache.commons.collections.functors.PredicateDecorator;
+
 /**
  * DelegatedSinglePredicateContainer is an abstract class providing 
functionality to managing a
  * delegate used to hold a since {@link Predicate}s. For example 
<code>not</code>.

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/EqualsPredicate.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/EqualsPredicate.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/EqualsPredicate.java
index a1a8716..2bbb672 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/EqualsPredicate.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/EqualsPredicate.java
@@ -18,9 +18,6 @@
 
 package org.apache.ambari.server.collections.functors;
 
-import org.apache.ambari.server.collections.Predicate;
-import org.apache.commons.collections.functors.EqualPredicate;
-
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
@@ -28,6 +25,9 @@ import java.util.Collections;
 import java.util.Iterator;
 import java.util.Map;
 
+import org.apache.ambari.server.collections.Predicate;
+import org.apache.commons.collections.functors.EqualPredicate;
+
 /**
  * {@link EqualsPredicate} wraps {@link 
org.apache.commons.collections.functors.EqualPredicate} to
  * provide additional functionality like serializing to and from a Map and 
JSON formatted data as well

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/NotPredicate.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/NotPredicate.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/NotPredicate.java
index 64dc592..72ad788 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/NotPredicate.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/NotPredicate.java
@@ -18,12 +18,12 @@
 
 package org.apache.ambari.server.collections.functors;
 
+import java.util.Map;
+
 import org.apache.ambari.server.collections.PredicateUtils;
 import org.apache.commons.collections.Predicate;
 import org.apache.commons.collections.functors.PredicateDecorator;
 
-import java.util.Map;
-
 /**
  * {@link NotPredicate} wraps {@link 
org.apache.commons.collections.functors.NotPredicate} to
  * provide additional functionality like serializing to and from a Map and 
JSON formatted data.

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/OrPredicate.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/OrPredicate.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/OrPredicate.java
index b207e40..4134c65 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/OrPredicate.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/OrPredicate.java
@@ -18,14 +18,14 @@
 
 package org.apache.ambari.server.collections.functors;
 
-import org.apache.ambari.server.collections.PredicateUtils;
-import org.apache.commons.collections.Predicate;
-import org.apache.commons.collections.functors.PredicateDecorator;
-
 import java.util.Collection;
 import java.util.Iterator;
 import java.util.Map;
 
+import org.apache.ambari.server.collections.PredicateUtils;
+import org.apache.commons.collections.Predicate;
+import org.apache.commons.collections.functors.PredicateDecorator;
+
 /**
  * {@link OrPredicate} wraps {@link 
org.apache.commons.collections.functors.OrPredicate} to
  * provide additional functionality like serializing to and from a Map and 
JSON formatted data.

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/PredicateClassFactory.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/PredicateClassFactory.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/PredicateClassFactory.java
index f1f85c0..2ef64d7 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/PredicateClassFactory.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/collections/functors/PredicateClassFactory.java
@@ -18,12 +18,12 @@
 
 package org.apache.ambari.server.collections.functors;
 
-import org.apache.ambari.server.collections.Predicate;
-
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 
+import org.apache.ambari.server.collections.Predicate;
+
 /**
  * {@link PredicateClassFactory} is a factory class used to derive a {@link 
Predicate} implementation
  * class from its name.

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/configuration/Configuration.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/configuration/Configuration.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/configuration/Configuration.java
index 50ec0e2..f9b6878 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/configuration/Configuration.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/configuration/Configuration.java
@@ -17,16 +17,35 @@
  */
 package org.apache.ambari.server.configuration;
 
-import com.google.common.collect.Multimap;
-import com.google.common.collect.Sets;
-import com.google.gson.Gson;
-import com.google.gson.GsonBuilder;
-import com.google.gson.JsonElement;
-import com.google.gson.JsonObject;
-import com.google.gson.JsonParser;
-import com.google.gson.JsonPrimitive;
-import com.google.inject.Inject;
-import com.google.inject.Singleton;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.Writer;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import java.lang.reflect.Field;
+import java.security.cert.CertificateException;
+import java.security.interfaces.RSAPublicKey;
+import java.util.ArrayList;
+import java.util.EnumSet;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Properties;
+import java.util.Set;
+import java.util.SortedMap;
+import java.util.TreeMap;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
 import org.apache.ambari.annotations.Experimental;
 import org.apache.ambari.annotations.ExperimentalFeature;
 import org.apache.ambari.annotations.Markdown;
@@ -70,34 +89,16 @@ import org.apache.commons.lang.math.NumberUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileNotFoundException;
-import java.io.FileReader;
-import java.io.FileWriter;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.Writer;
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-import java.lang.reflect.Field;
-import java.security.cert.CertificateException;
-import java.security.interfaces.RSAPublicKey;
-import java.util.ArrayList;
-import java.util.EnumSet;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Properties;
-import java.util.Set;
-import java.util.SortedMap;
-import java.util.TreeMap;
-import java.util.concurrent.Callable;
-import java.util.concurrent.ThreadPoolExecutor;
-import java.util.concurrent.TimeUnit;
+import com.google.common.collect.Multimap;
+import com.google.common.collect.Sets;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+import com.google.gson.JsonPrimitive;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
 
 /**
  * The {@link Configuration} class is used to read from the

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariHandlerList.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariHandlerList.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariHandlerList.java
index ef473d5..5268b12 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariHandlerList.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariHandlerList.java
@@ -17,6 +17,21 @@
  */
 package org.apache.ambari.server.controller;
 
+import java.io.IOException;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import javax.inject.Inject;
+import javax.inject.Provider;
+import javax.inject.Singleton;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
 import org.apache.ambari.server.api.AmbariPersistFilter;
 import org.apache.ambari.server.orm.entities.ViewEntity;
 import org.apache.ambari.server.orm.entities.ViewInstanceEntity;
@@ -37,20 +52,6 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.web.filter.DelegatingFilterProxy;
 
-import javax.inject.Inject;
-import javax.inject.Provider;
-import javax.inject.Singleton;
-import javax.servlet.ServletException;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
 /**
  * An Ambari specific extension of the FailsafeHandlerList that allows for the 
addition
  * of view instances as handlers.

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariServer.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariServer.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariServer.java
index fccf9a8..65a4b1c 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariServer.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariServer.java
@@ -19,9 +19,6 @@
 package org.apache.ambari.server.controller;
 
 
-import javax.crypto.BadPaddingException;
-import javax.servlet.DispatcherType;
-
 import java.io.File;
 import java.io.IOException;
 import java.net.Authenticator;
@@ -35,6 +32,9 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.logging.LogManager;
 
+import javax.crypto.BadPaddingException;
+import javax.servlet.DispatcherType;
+
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.StateRecoveryManager;
 import org.apache.ambari.server.StaticallyInject;
@@ -100,10 +100,10 @@ import 
org.apache.ambari.server.security.CertificateManager;
 import org.apache.ambari.server.security.SecurityFilter;
 import 
org.apache.ambari.server.security.authorization.AmbariLdapAuthenticationProvider;
 import org.apache.ambari.server.security.authorization.AmbariLocalUserProvider;
+import 
org.apache.ambari.server.security.authorization.AmbariPamAuthenticationProvider;
 import 
org.apache.ambari.server.security.authorization.AmbariUserAuthorizationFilter;
 import org.apache.ambari.server.security.authorization.PermissionHelper;
 import org.apache.ambari.server.security.authorization.Users;
-import 
org.apache.ambari.server.security.authorization.AmbariPamAuthenticationProvider;
 import 
org.apache.ambari.server.security.authorization.internal.AmbariInternalAuthenticationProvider;
 import org.apache.ambari.server.security.ldap.AmbariLdapDataPopulator;
 import org.apache.ambari.server.security.unsecured.rest.CertificateDownload;

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariSessionManager.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariSessionManager.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariSessionManager.java
index fbf9d90..33d662d 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariSessionManager.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariSessionManager.java
@@ -18,15 +18,15 @@
 
 package org.apache.ambari.server.controller;
 
+import javax.inject.Inject;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpSession;
+
 import org.eclipse.jetty.server.SessionManager;
 import org.springframework.web.context.request.RequestAttributes;
 import org.springframework.web.context.request.RequestContextHolder;
 import org.springframework.web.context.request.ServletRequestAttributes;
 
-import javax.inject.Inject;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpSession;
-
 /**
  * Class to expose current session information.
  */

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/AuthToLocalBuilder.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/AuthToLocalBuilder.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/AuthToLocalBuilder.java
index 1fb912e..8c70a47 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/AuthToLocalBuilder.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/AuthToLocalBuilder.java
@@ -18,8 +18,6 @@
 
 package org.apache.ambari.server.controller;
 
-import org.apache.commons.lang.StringUtils;
-
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
@@ -30,6 +28,8 @@ import java.util.TreeSet;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import org.apache.commons.lang.StringUtils;
+
 /**
  * AuthToLocalBuilder helps to create auth_to_local rules for use in 
configuration files like
  * core-site.xml.  No duplicate rules will be generated.

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/ClusterResponse.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/ClusterResponse.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/ClusterResponse.java
index e19f8f6..b3a2def 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/ClusterResponse.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/ClusterResponse.java
@@ -19,15 +19,13 @@
 package org.apache.ambari.server.controller;
 
 import java.util.Collection;
-import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
-import com.google.common.collect.Multimap;
+import org.apache.ambari.server.state.ClusterHealthReport;
 import org.apache.ambari.server.state.DesiredConfig;
 import org.apache.ambari.server.state.SecurityType;
 import org.apache.ambari.server.state.State;
-import org.apache.ambari.server.state.ClusterHealthReport;
 
 public class ClusterResponse {
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/ConfigGroupRequest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/ConfigGroupRequest.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/ConfigGroupRequest.java
index efa1a7e..412e333 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/ConfigGroupRequest.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/ConfigGroupRequest.java
@@ -17,12 +17,11 @@
  */
 package org.apache.ambari.server.controller;
 
-import org.apache.ambari.server.state.Config;
-
-import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
+import org.apache.ambari.server.state.Config;
+
 public class ConfigGroupRequest {
   private Long id;
   private String clusterName;

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/ControllerModule.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/ControllerModule.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/ControllerModule.java
index 8058515..9c93c60 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/ControllerModule.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/ControllerModule.java
@@ -18,6 +18,21 @@
 
 package org.apache.ambari.server.controller;
 
+import static 
org.eclipse.persistence.config.PersistenceUnitProperties.CREATE_JDBC_DDL_FILE;
+import static 
org.eclipse.persistence.config.PersistenceUnitProperties.CREATE_ONLY;
+import static 
org.eclipse.persistence.config.PersistenceUnitProperties.CREATE_OR_EXTEND;
+import static 
org.eclipse.persistence.config.PersistenceUnitProperties.DDL_BOTH_GENERATION;
+import static 
org.eclipse.persistence.config.PersistenceUnitProperties.DDL_GENERATION;
+import static 
org.eclipse.persistence.config.PersistenceUnitProperties.DDL_GENERATION_MODE;
+import static 
org.eclipse.persistence.config.PersistenceUnitProperties.DROP_AND_CREATE;
+import static 
org.eclipse.persistence.config.PersistenceUnitProperties.DROP_JDBC_DDL_FILE;
+import static 
org.eclipse.persistence.config.PersistenceUnitProperties.JDBC_DRIVER;
+import static 
org.eclipse.persistence.config.PersistenceUnitProperties.JDBC_PASSWORD;
+import static 
org.eclipse.persistence.config.PersistenceUnitProperties.JDBC_URL;
+import static 
org.eclipse.persistence.config.PersistenceUnitProperties.JDBC_USER;
+import static 
org.eclipse.persistence.config.PersistenceUnitProperties.NON_JTA_DATASOURCE;
+import static 
org.eclipse.persistence.config.PersistenceUnitProperties.THROW_EXCEPTIONS;
+
 import java.beans.PropertyVetoException;
 import java.lang.annotation.Annotation;
 import java.security.SecureRandom;
@@ -93,7 +108,6 @@ import 
org.apache.ambari.server.serveraction.kerberos.KerberosOperationHandlerFa
 import org.apache.ambari.server.serveraction.users.CollectionPersisterService;
 import 
org.apache.ambari.server.serveraction.users.CollectionPersisterServiceFactory;
 import org.apache.ambari.server.serveraction.users.CsvFilePersisterService;
-import org.apache.ambari.server.serveraction.users.ShellCommandCallableFactory;
 import org.apache.ambari.server.stack.StackManagerFactory;
 import org.apache.ambari.server.stageplanner.RoleGraphFactory;
 import org.apache.ambari.server.state.Cluster;
@@ -156,21 +170,6 @@ import com.google.inject.persist.PersistModule;
 import com.google.inject.persist.jpa.AmbariJpaPersistModule;
 import com.mchange.v2.c3p0.ComboPooledDataSource;
 
-import static 
org.eclipse.persistence.config.PersistenceUnitProperties.CREATE_JDBC_DDL_FILE;
-import static 
org.eclipse.persistence.config.PersistenceUnitProperties.CREATE_ONLY;
-import static 
org.eclipse.persistence.config.PersistenceUnitProperties.CREATE_OR_EXTEND;
-import static 
org.eclipse.persistence.config.PersistenceUnitProperties.DDL_BOTH_GENERATION;
-import static 
org.eclipse.persistence.config.PersistenceUnitProperties.DDL_GENERATION;
-import static 
org.eclipse.persistence.config.PersistenceUnitProperties.DDL_GENERATION_MODE;
-import static 
org.eclipse.persistence.config.PersistenceUnitProperties.DROP_AND_CREATE;
-import static 
org.eclipse.persistence.config.PersistenceUnitProperties.DROP_JDBC_DDL_FILE;
-import static 
org.eclipse.persistence.config.PersistenceUnitProperties.JDBC_DRIVER;
-import static 
org.eclipse.persistence.config.PersistenceUnitProperties.JDBC_PASSWORD;
-import static 
org.eclipse.persistence.config.PersistenceUnitProperties.JDBC_URL;
-import static 
org.eclipse.persistence.config.PersistenceUnitProperties.JDBC_USER;
-import static 
org.eclipse.persistence.config.PersistenceUnitProperties.NON_JTA_DATASOURCE;
-import static 
org.eclipse.persistence.config.PersistenceUnitProperties.THROW_EXCEPTIONS;
-
 /**
  * Used for injection purposes.
  */

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/ExecuteActionRequest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/ExecuteActionRequest.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/ExecuteActionRequest.java
index c750fca..ae7020a 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/ExecuteActionRequest.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/ExecuteActionRequest.java
@@ -17,14 +17,14 @@
  */
 package org.apache.ambari.server.controller;
 
-import org.apache.ambari.server.controller.internal.RequestOperationLevel;
-import org.apache.ambari.server.controller.internal.RequestResourceFilter;
-
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import org.apache.ambari.server.controller.internal.RequestOperationLevel;
+import org.apache.ambari.server.controller.internal.RequestResourceFilter;
+
 /**
  * Helper class to capture details used to create action or custom commands
  */

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/ExtensionVersionResponse.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/ExtensionVersionResponse.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/ExtensionVersionResponse.java
index bf2db5c..860a0f7 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/ExtensionVersionResponse.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/ExtensionVersionResponse.java
@@ -18,11 +18,8 @@
 
 package org.apache.ambari.server.controller;
 
-import java.io.File;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.HashSet;
-import java.util.Map;
 import java.util.Set;
 
 import org.apache.ambari.server.stack.Validable;

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/KerberosHelper.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/KerberosHelper.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/KerberosHelper.java
index 35235db..0e27d03 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/KerberosHelper.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/KerberosHelper.java
@@ -18,6 +18,12 @@
 
 package org.apache.ambari.server.controller;
 
+import java.io.IOException;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.controller.internal.RequestStageContainer;
 import org.apache.ambari.server.security.credential.PrincipalKeyCredential;
@@ -33,12 +39,6 @@ import 
org.apache.ambari.server.state.kerberos.KerberosConfigurationDescriptor;
 import org.apache.ambari.server.state.kerberos.KerberosDescriptor;
 import org.apache.ambari.server.state.kerberos.KerberosIdentityDescriptor;
 
-import java.io.IOException;
-import java.util.Collection;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-
 public interface KerberosHelper {
   /**
    * directive used to override the behavior of the 
kerberos-env/manage_identities property

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/KerberosHelperImpl.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/KerberosHelperImpl.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/KerberosHelperImpl.java
index 810c7d5..3261a56 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/KerberosHelperImpl.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/KerberosHelperImpl.java
@@ -57,7 +57,6 @@ import org.apache.ambari.server.orm.entities.ArtifactEntity;
 import org.apache.ambari.server.security.credential.Credential;
 import org.apache.ambari.server.security.credential.PrincipalKeyCredential;
 import org.apache.ambari.server.security.encryption.CredentialStoreService;
-import org.apache.ambari.server.serveraction.ActionLog;
 import org.apache.ambari.server.serveraction.ServerAction;
 import org.apache.ambari.server.serveraction.kerberos.CleanupServerAction;
 import 
org.apache.ambari.server.serveraction.kerberos.ConfigureAmbariIdentitiesServerAction;
@@ -792,7 +791,7 @@ public class KerberosHelperImpl implements KerberosHelper {
    * @param kerberosDetails      a KerberosDetails containing information 
about relevant Kerberos configuration
    * @param updateJAASFile       true to update Ambari's JAAS file; false 
otherwise
    * @throws AmbariException
-   * @see ConfigureAmbariIdentitiesServerAction#configureJAAS(String, String, 
ActionLog)
+   * @see ConfigureAmbariIdentitiesServerAction#configureJAAS(String, String, 
org.apache.ambari.server.serveraction.ActionLog)
    */
   private void installAmbariIdentity(KerberosIdentityDescriptor 
ambariServerIdentity,
                                      Keytab keytab, Map<String, Map<String, 
String>> configurations,

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/LdapSyncRequest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/LdapSyncRequest.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/LdapSyncRequest.java
index 02cf3f0..135b286 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/LdapSyncRequest.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/LdapSyncRequest.java
@@ -18,11 +18,11 @@
 
 package org.apache.ambari.server.controller;
 
-import org.apache.ambari.server.orm.entities.LdapSyncSpecEntity;
-
 import java.util.HashSet;
 import java.util.Set;
 
+import org.apache.ambari.server.orm.entities.LdapSyncSpecEntity;
+
 /**
  * Request for LDAP synchronization.
  */

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/ResourceProviderFactory.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/ResourceProviderFactory.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/ResourceProviderFactory.java
index 3ec38c2..2ab69cb 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/ResourceProviderFactory.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/ResourceProviderFactory.java
@@ -28,7 +28,6 @@ import org.apache.ambari.server.controller.spi.Resource.Type;
 import org.apache.ambari.server.controller.spi.ResourceProvider;
 
 import com.google.inject.name.Named;
-import java.util.Set;
 
 public interface ResourceProviderFactory {
   @Named("host")

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/RootServiceResponseFactory.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/RootServiceResponseFactory.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/RootServiceResponseFactory.java
index 6bb68b6..dadcf09 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/RootServiceResponseFactory.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/RootServiceResponseFactory.java
@@ -18,13 +18,13 @@
 
 package org.apache.ambari.server.controller;
 
+import static 
org.apache.ambari.server.agent.ExecutionCommand.KeyNames.JDK_LOCATION;
+
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.Map;
 import java.util.Set;
 
-import static 
org.apache.ambari.server.agent.ExecutionCommand.KeyNames.JDK_LOCATION;
-
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.ObjectNotFoundException;
 import org.apache.ambari.server.api.services.AmbariMetaInfo;

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/ServiceConfigVersionResponse.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/ServiceConfigVersionResponse.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/ServiceConfigVersionResponse.java
index 69b35f8..275d703 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/ServiceConfigVersionResponse.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/ServiceConfigVersionResponse.java
@@ -20,7 +20,6 @@ package org.apache.ambari.server.controller;
 
 
 import java.util.List;
-import java.util.Objects;
 
 import org.apache.ambari.server.StaticallyInject;
 import org.apache.ambari.server.orm.dao.HostDAO;

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/StackLevelConfigurationResponse.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/StackLevelConfigurationResponse.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/StackLevelConfigurationResponse.java
index c0f45a4..e0e872a 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/StackLevelConfigurationResponse.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/StackLevelConfigurationResponse.java
@@ -23,7 +23,6 @@ import java.util.Map;
 import java.util.Set;
 
 import org.apache.ambari.server.state.PropertyDependencyInfo;
-import org.apache.ambari.server.state.PropertyInfo;
 import org.apache.ambari.server.state.PropertyInfo.PropertyType;
 import org.apache.ambari.server.state.ValueAttributesInfo;
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/StackServiceComponentResponse.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/StackServiceComponentResponse.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/StackServiceComponentResponse.java
index 980ca68..2f42313 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/StackServiceComponentResponse.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/StackServiceComponentResponse.java
@@ -18,15 +18,15 @@
 
 package org.apache.ambari.server.controller;
 
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
 import org.apache.ambari.server.state.AutoDeployInfo;
 import org.apache.ambari.server.state.BulkCommandDefinition;
 import org.apache.ambari.server.state.ComponentInfo;
 import org.apache.ambari.server.state.CustomCommandDefinition;
 
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-
 /**
  * Stack service component response.
  */

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/StackServiceResponse.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/StackServiceResponse.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/StackServiceResponse.java
index a6dd31f..09dd1ad 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/StackServiceResponse.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/StackServiceResponse.java
@@ -18,9 +18,6 @@
 
 package org.apache.ambari.server.controller;
 
-import org.apache.ambari.server.state.CustomCommandDefinition;
-import org.apache.ambari.server.state.ServiceInfo;
-
 import java.io.File;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -28,6 +25,9 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
+import org.apache.ambari.server.state.CustomCommandDefinition;
+import org.apache.ambari.server.state.ServiceInfo;
+
 public class StackServiceResponse {
 
   private String stackName;

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/StackVersionResponse.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/StackVersionResponse.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/StackVersionResponse.java
index 53414e7..6463c50 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/StackVersionResponse.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/StackVersionResponse.java
@@ -24,6 +24,7 @@ import java.util.Collections;
 import java.util.HashSet;
 import java.util.Map;
 import java.util.Set;
+
 import org.apache.ambari.server.stack.Validable;
 
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/UserResponse.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/UserResponse.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/UserResponse.java
index d481327..b90f864 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/UserResponse.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/UserResponse.java
@@ -17,11 +17,11 @@
  */
 package org.apache.ambari.server.controller;
 
-import org.apache.ambari.server.security.authorization.UserType;
-
 import java.util.Collections;
 import java.util.Set;
 
+import org.apache.ambari.server.security.authorization.UserType;
+
 /**
  * Represents a user maintenance request.
  */

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerComponentProvider.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerComponentProvider.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerComponentProvider.java
index 8680026..b0d953a 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerComponentProvider.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerComponentProvider.java
@@ -18,14 +18,14 @@
 
 package org.apache.ambari.server.controller.gsinstaller;
 
+import java.util.Set;
+
 import org.apache.ambari.server.controller.internal.ResourceImpl;
 import org.apache.ambari.server.controller.spi.Predicate;
 import org.apache.ambari.server.controller.spi.Request;
 import org.apache.ambari.server.controller.spi.Resource;
 import org.apache.ambari.server.controller.utilities.PropertyHelper;
 
-import java.util.Set;
-
 /**
  * A component resource provider for a gsInstaller defined cluster.
  */

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerHostComponentProvider.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerHostComponentProvider.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerHostComponentProvider.java
index e04a258..d35c2ce 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerHostComponentProvider.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerHostComponentProvider.java
@@ -18,14 +18,14 @@
 
 package org.apache.ambari.server.controller.gsinstaller;
 
+import java.util.Set;
+
 import org.apache.ambari.server.controller.internal.ResourceImpl;
 import org.apache.ambari.server.controller.spi.Predicate;
 import org.apache.ambari.server.controller.spi.Request;
 import org.apache.ambari.server.controller.spi.Resource;
 import org.apache.ambari.server.controller.utilities.PropertyHelper;
 
-import java.util.Set;
-
 /**
  * A host component resource provider for a gsInstaller defined cluster.
  */

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerHostProvider.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerHostProvider.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerHostProvider.java
index cab9811..5b69da4 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerHostProvider.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerHostProvider.java
@@ -18,14 +18,14 @@
 
 package org.apache.ambari.server.controller.gsinstaller;
 
+import java.util.Set;
+
 import org.apache.ambari.server.controller.internal.ResourceImpl;
 import org.apache.ambari.server.controller.spi.Predicate;
 import org.apache.ambari.server.controller.spi.Request;
 import org.apache.ambari.server.controller.spi.Resource;
 import org.apache.ambari.server.controller.utilities.PropertyHelper;
 
-import java.util.Set;
-
 /**
  * A host resource provider for a gsInstaller defined cluster.
  */

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerNoOpProvider.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerNoOpProvider.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerNoOpProvider.java
index 948b7f5..6c9bf8e 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerNoOpProvider.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerNoOpProvider.java
@@ -17,15 +17,15 @@
  */
 package org.apache.ambari.server.controller.gsinstaller;
 
-import org.apache.ambari.server.controller.spi.Predicate;
-import org.apache.ambari.server.controller.spi.Request;
-import org.apache.ambari.server.controller.spi.Resource;
-
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
 
+import org.apache.ambari.server.controller.spi.Predicate;
+import org.apache.ambari.server.controller.spi.Request;
+import org.apache.ambari.server.controller.spi.Resource;
+
 /**
  * A NO-OP resource provider for a gsInstaller defined cluster.
  */

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerProviderModule.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerProviderModule.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerProviderModule.java
index 2e85ba5..53efe8f 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerProviderModule.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerProviderModule.java
@@ -18,16 +18,16 @@
 
 package org.apache.ambari.server.controller.gsinstaller;
 
-import org.apache.ambari.server.controller.internal.AbstractProviderModule;
-import org.apache.ambari.server.controller.spi.Resource;
-import org.apache.ambari.server.controller.spi.ResourceProvider;
-
 import java.io.IOException;
 import java.net.HttpURLConnection;
 import java.net.URL;
 import java.util.HashMap;
 import java.util.Map;
 
+import org.apache.ambari.server.controller.internal.AbstractProviderModule;
+import org.apache.ambari.server.controller.spi.Resource;
+import org.apache.ambari.server.controller.spi.ResourceProvider;
+
 /**
  * A provider module implementation that uses the GSInstaller resource 
provider.
  */

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerResourceProvider.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerResourceProvider.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerResourceProvider.java
index 66cdff1..4285f31 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerResourceProvider.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerResourceProvider.java
@@ -18,6 +18,10 @@
 
 package org.apache.ambari.server.controller.gsinstaller;
 
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
 import org.apache.ambari.server.controller.internal.ResourceImpl;
 import org.apache.ambari.server.controller.spi.NoSuchParentResourceException;
 import org.apache.ambari.server.controller.spi.NoSuchResourceException;
@@ -32,10 +36,6 @@ import 
org.apache.ambari.server.controller.spi.UnsupportedPropertyException;
 import org.apache.ambari.server.controller.utilities.PredicateHelper;
 import org.apache.ambari.server.controller.utilities.PropertyHelper;
 
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
-
 
 /**
  * An abstract resource provider for a gsInstaller defined cluster.

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerServiceProvider.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerServiceProvider.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerServiceProvider.java
index 89b1c86..2438273 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerServiceProvider.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/gsinstaller/GSInstallerServiceProvider.java
@@ -18,14 +18,14 @@
 
 package org.apache.ambari.server.controller.gsinstaller;
 
+import java.util.Set;
+
 import org.apache.ambari.server.controller.internal.ResourceImpl;
 import org.apache.ambari.server.controller.spi.Predicate;
 import org.apache.ambari.server.controller.spi.Request;
 import org.apache.ambari.server.controller.spi.Resource;
 import org.apache.ambari.server.controller.utilities.PropertyHelper;
 
-import java.util.Set;
-
 /**
  * A service resource provider for a gsInstaller defined cluster.
  */

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractAuthorizedResourceProvider.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractAuthorizedResourceProvider.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractAuthorizedResourceProvider.java
index 253d23c..77279db 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractAuthorizedResourceProvider.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractAuthorizedResourceProvider.java
@@ -18,6 +18,11 @@
 
 package org.apache.ambari.server.controller.internal;
 
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
 import org.apache.ambari.server.controller.spi.NoSuchParentResourceException;
 import org.apache.ambari.server.controller.spi.NoSuchResourceException;
 import org.apache.ambari.server.controller.spi.Predicate;
@@ -30,16 +35,11 @@ import 
org.apache.ambari.server.controller.spi.ResourceProvider;
 import org.apache.ambari.server.controller.spi.SystemException;
 import org.apache.ambari.server.controller.spi.UnsupportedPropertyException;
 import org.apache.ambari.server.security.authorization.AuthorizationException;
+import org.apache.ambari.server.security.authorization.AuthorizationHelper;
 import org.apache.ambari.server.security.authorization.ResourceType;
 import org.apache.ambari.server.security.authorization.RoleAuthorization;
-import org.apache.ambari.server.security.authorization.AuthorizationHelper;
 import org.springframework.security.core.Authentication;
 
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
-
 /**
  * AbstractAuthorizedResourceProvider helps to provide an authorization layer 
for a resource provider.
  * <p/>

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractDRResourceProvider.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractDRResourceProvider.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractDRResourceProvider.java
index 95c64a8..53e184a 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractDRResourceProvider.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractDRResourceProvider.java
@@ -18,13 +18,13 @@
 
 package org.apache.ambari.server.controller.internal;
 
+import java.util.Map;
+import java.util.Set;
+
 import org.apache.ambari.server.controller.ivory.IvoryService;
 import org.apache.ambari.server.controller.spi.Resource;
 import org.apache.ambari.server.controller.spi.ResourceProvider;
 
-import java.util.Map;
-import java.util.Set;
-
 /**
  * Abstract resource provider implementation that maps to an Ivory service.
  */

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractPropertyProvider.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractPropertyProvider.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractPropertyProvider.java
index 2b7ee4e..7cea24a 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractPropertyProvider.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractPropertyProvider.java
@@ -18,20 +18,6 @@
 
 package org.apache.ambari.server.controller.internal;
 
-import org.apache.ambari.server.AmbariException;
-import org.apache.ambari.server.controller.AmbariManagementController;
-import org.apache.ambari.server.controller.AmbariServer;
-import org.apache.ambari.server.controller.metrics.MetricReportingAdapter;
-import org.apache.ambari.server.controller.spi.PropertyProvider;
-import org.apache.ambari.server.controller.spi.Resource;
-import org.apache.ambari.server.controller.spi.TemporalInfo;
-import org.apache.ambari.server.controller.utilities.PropertyHelper;
-import org.apache.ambari.server.security.authorization.AuthorizationException;
-import org.apache.ambari.server.security.authorization.AuthorizationHelper;
-import org.apache.ambari.server.security.authorization.ResourceType;
-import org.apache.ambari.server.security.authorization.RoleAuthorization;
-import org.apache.hadoop.metrics2.sink.timeline.TimelineMetric;
-
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.text.DecimalFormat;
@@ -46,6 +32,20 @@ import java.util.Set;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import org.apache.ambari.server.AmbariException;
+import org.apache.ambari.server.controller.AmbariManagementController;
+import org.apache.ambari.server.controller.AmbariServer;
+import org.apache.ambari.server.controller.metrics.MetricReportingAdapter;
+import org.apache.ambari.server.controller.spi.PropertyProvider;
+import org.apache.ambari.server.controller.spi.Resource;
+import org.apache.ambari.server.controller.spi.TemporalInfo;
+import org.apache.ambari.server.controller.utilities.PropertyHelper;
+import org.apache.ambari.server.security.authorization.AuthorizationException;
+import org.apache.ambari.server.security.authorization.AuthorizationHelper;
+import org.apache.ambari.server.security.authorization.ResourceType;
+import org.apache.ambari.server.security.authorization.RoleAuthorization;
+import org.apache.hadoop.metrics2.sink.timeline.TimelineMetric;
+
 /**
  *  Abstract property provider implementation.
  */

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractResourceProvider.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractResourceProvider.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractResourceProvider.java
index 66f1d7e..130370d 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractResourceProvider.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractResourceProvider.java
@@ -23,8 +23,8 @@ import java.util.HashSet;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
-import java.util.Set;
 import java.util.Map.Entry;
+import java.util.Set;
 import java.util.regex.Pattern;
 
 import org.apache.ambari.server.AmbariException;
@@ -35,7 +35,17 @@ import 
org.apache.ambari.server.controller.ConfigurationRequest;
 import org.apache.ambari.server.controller.RequestStatusResponse;
 import org.apache.ambari.server.controller.predicate.ArrayPredicate;
 import org.apache.ambari.server.controller.predicate.EqualsPredicate;
-import org.apache.ambari.server.controller.spi.*;
+import org.apache.ambari.server.controller.spi.NoSuchParentResourceException;
+import org.apache.ambari.server.controller.spi.NoSuchResourceException;
+import org.apache.ambari.server.controller.spi.Predicate;
+import org.apache.ambari.server.controller.spi.Request;
+import org.apache.ambari.server.controller.spi.RequestStatus;
+import org.apache.ambari.server.controller.spi.RequestStatusMetaData;
+import org.apache.ambari.server.controller.spi.Resource;
+import org.apache.ambari.server.controller.spi.ResourceAlreadyExistsException;
+import org.apache.ambari.server.controller.spi.ResourceProvider;
+import org.apache.ambari.server.controller.spi.SystemException;
+import org.apache.ambari.server.controller.spi.UnsupportedPropertyException;
 import org.apache.ambari.server.controller.utilities.PredicateHelper;
 import org.apache.ambari.server.controller.utilities.PropertyHelper;
 import org.apache.ambari.server.security.authorization.AuthorizationException;

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/ActionResourceProvider.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/ActionResourceProvider.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/ActionResourceProvider.java
index 54fa54c..47af083 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/ActionResourceProvider.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/ActionResourceProvider.java
@@ -19,6 +19,12 @@
 
 package org.apache.ambari.server.controller.internal;
 
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.actionmanager.ActionManager;
 import org.apache.ambari.server.api.services.AmbariMetaInfo;
@@ -38,12 +44,6 @@ import 
org.apache.ambari.server.controller.spi.UnsupportedPropertyException;
 import org.apache.ambari.server.controller.utilities.PropertyHelper;
 import org.apache.ambari.server.customactions.ActionDefinition;
 
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-
 public class ActionResourceProvider extends AbstractControllerResourceProvider 
{
 
   public static final String ACTION_NAME_PROPERTY_ID = PropertyHelper

http://git-wip-us.apache.org/repos/asf/ambari/blob/e4db5709/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/ActiveWidgetLayoutResourceProvider.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/ActiveWidgetLayoutResourceProvider.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/ActiveWidgetLayoutResourceProvider.java
index d149a70..13d6f98 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/ActiveWidgetLayoutResourceProvider.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/ActiveWidgetLayoutResourceProvider.java
@@ -17,9 +17,13 @@
  */
 package org.apache.ambari.server.controller.internal;
 
-import com.google.gson.Gson;
-import com.google.gson.reflect.TypeToken;
-import com.google.inject.Inject;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
 import org.apache.ambari.server.AmbariException;
 import org.apache.ambari.server.StaticallyInject;
 import org.apache.ambari.server.controller.AmbariManagementController;
@@ -47,12 +51,9 @@ import 
org.apache.ambari.server.security.authorization.AuthorizationHelper;
 import org.apache.ambari.server.security.authorization.ResourceType;
 import org.apache.ambari.server.security.authorization.RoleAuthorization;
 
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
+import com.google.gson.Gson;
+import com.google.gson.reflect.TypeToken;
+import com.google.inject.Inject;
 
 /**
  * Resource provider for widget layout resources.

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