http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheckTest.java
index 334b3b3..3eaf890 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesTezDistributedCacheCheckTest.java
@@ -95,13 +95,13 @@ public class ServicesTezDistributedCacheCheckTest {
 
     final DesiredConfig desiredConfig = Mockito.mock(DesiredConfig.class);
     Mockito.when(desiredConfig.getTag()).thenReturn("tag");
-    Map<String, DesiredConfig> configMap = new HashMap<String, 
DesiredConfig>();
+    Map<String, DesiredConfig> configMap = new HashMap<>();
     configMap.put("tez-site", desiredConfig);
     configMap.put("core-site", desiredConfig);
     Mockito.when(cluster.getDesiredConfigs()).thenReturn(configMap);
     final Config config = Mockito.mock(Config.class);
     Mockito.when(cluster.getConfig(Mockito.anyString(), 
Mockito.anyString())).thenReturn(config);
-    final Map<String, String> properties = new HashMap<String, String>();
+    final Map<String, String> properties = new HashMap<>();
     Mockito.when(config.getProperties()).thenReturn(properties);
 
     PrerequisiteCheck check = new PrerequisiteCheck(null, null);
@@ -169,16 +169,16 @@ public class ServicesTezDistributedCacheCheckTest {
 
     final DesiredConfig desiredConfig = Mockito.mock(DesiredConfig.class);
     Mockito.when(desiredConfig.getTag()).thenReturn("tag");
-    Map<String, DesiredConfig> configMap = new HashMap<String, 
DesiredConfig>();
+    Map<String, DesiredConfig> configMap = new HashMap<>();
     configMap.put("tez-site", desiredConfig);
     configMap.put("core-site", desiredConfig);
     Mockito.when(cluster.getDesiredConfigs()).thenReturn(configMap);
     final Config config = Mockito.mock(Config.class);
     Mockito.when(cluster.getConfig(Mockito.anyString(), 
Mockito.anyString())).thenReturn(config);
-    final Map<String, String> properties = new HashMap<String, String>();
+    final Map<String, String> properties = new HashMap<>();
     Mockito.when(config.getProperties()).thenReturn(properties);
 
-    Map<String, String> checkProperties = new HashMap<String, String>();
+    Map<String, String> checkProperties = new HashMap<>();
     checkProperties.put("dfs-protocols-regex","^([^:]*dfs|wasb|ecs):.*");
     PrerequisiteCheckConfig prerequisiteCheckConfig = 
Mockito.mock(PrerequisiteCheckConfig.class);
     Mockito.when(prerequisiteCheckConfig.getCheckProperties(

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesUpCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesUpCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesUpCheckTest.java
index 65505fa..1368b8d 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesUpCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesUpCheckTest.java
@@ -116,7 +116,7 @@ public class ServicesUpCheckTest {
     final Service tezService = Mockito.mock(Service.class);
     final Service amsService = Mockito.mock(Service.class);
 
-    HashMap<String, Service> clusterServices = new HashMap<String, Service>();
+    HashMap<String, Service> clusterServices = new HashMap<>();
     clusterServices.put("HDFS", hdfsService);
     clusterServices.put("TEZ", tezService);
     clusterServices.put("AMBARI_METRICS", amsService);
@@ -148,7 +148,7 @@ public class ServicesUpCheckTest {
 
     // Put Components inside Services
     // HDFS
-    Map<String, ServiceComponent> hdfsComponents = new HashMap<String, 
ServiceComponent>();
+    Map<String, ServiceComponent> hdfsComponents = new HashMap<>();
 
     ServiceComponent nameNode = Mockito.mock(ServiceComponent.class);
     Mockito.when(nameNode.getName()).thenReturn("NAMENODE");
@@ -175,7 +175,7 @@ public class ServicesUpCheckTest {
     
Mockito.when(hdfsService.getServiceComponents()).thenReturn(hdfsComponents);
 
     // TEZ
-    Map<String, ServiceComponent> tezComponents = new HashMap<String, 
ServiceComponent>();
+    Map<String, ServiceComponent> tezComponents = new HashMap<>();
 
     ServiceComponent tezClient = Mockito.mock(ServiceComponent.class);
     Mockito.when(tezClient.getName()).thenReturn("TEZ_CLIENT");
@@ -187,7 +187,7 @@ public class ServicesUpCheckTest {
     Mockito.when(tezService.getServiceComponents()).thenReturn(tezComponents);
 
     // AMS
-    Map<String, ServiceComponent> amsComponents = new HashMap<String, 
ServiceComponent>();
+    Map<String, ServiceComponent> amsComponents = new HashMap<>();
 
     ServiceComponent metricsCollector = Mockito.mock(ServiceComponent.class);
     Mockito.when(metricsCollector.getName()).thenReturn("METRICS_COLLECTOR");
@@ -223,7 +223,7 @@ public class ServicesUpCheckTest {
     Mockito.when(hcsMetricsCollector.getHostId()).thenReturn(Long.valueOf(1));
     Mockito.when(hcsMetricsMonitor.getHostId()).thenReturn(Long.valueOf(1));
 
-    List<HostComponentSummary> allHostComponentSummaries = new 
ArrayList<HostComponentSummary>();
+    List<HostComponentSummary> allHostComponentSummaries = new ArrayList<>();
     allHostComponentSummaries.add(hcsNameNode);
     allHostComponentSummaries.add(hcsDataNode1);
     allHostComponentSummaries.add(hcsDataNode2);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheckTest.java
index 4dd3ffb..439710f 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesYarnWorkPreservingCheckTest.java
@@ -88,7 +88,7 @@ public class ServicesYarnWorkPreservingCheckTest {
     
Mockito.when(cluster.getDesiredConfigs()).thenReturn(Collections.singletonMap("yarn-site",
 desiredConfig));
     final Config config = Mockito.mock(Config.class);
     Mockito.when(cluster.getConfig(Mockito.anyString(), 
Mockito.anyString())).thenReturn(config);
-    final Map<String, String> properties = new HashMap<String, String>();
+    final Map<String, String> properties = new HashMap<>();
     Mockito.when(config.getProperties()).thenReturn(properties);
 
     PrerequisiteCheck check = new PrerequisiteCheck(null, null);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/YarnTimelineServerStatePreservingCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/YarnTimelineServerStatePreservingCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/YarnTimelineServerStatePreservingCheckTest.java
index 613e47f..7486c71 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/YarnTimelineServerStatePreservingCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/YarnTimelineServerStatePreservingCheckTest.java
@@ -77,7 +77,7 @@ public class YarnTimelineServerStatePreservingCheckTest {
     Mockito.when(m_clusters.getCluster("cluster")).thenReturn(cluster);
     Mockito.when(cluster.getCurrentStackVersion()).thenReturn(new 
StackId("HDP-2.2"));
 
-    Map<String, Service> services = new HashMap<String, Service>();
+    Map<String, Service> services = new HashMap<>();
     Mockito.when(cluster.getServices()).thenReturn(services);
 
     ClusterVersionEntity clusterVersionEntity = 
Mockito.mock(ClusterVersionEntity.class);
@@ -87,7 +87,7 @@ public class YarnTimelineServerStatePreservingCheckTest {
     
Mockito.when(clusterVersionEntity.getRepositoryVersion()).thenReturn(repositoryVersionEntity);
     Mockito.when(repositoryVersionEntity.getVersion()).thenReturn("2.2.4.2");
 
-    Map<String, String> checkProperties = new HashMap<String, String>();
+    Map<String, String> checkProperties = new HashMap<>();
     checkProperties.put("min-applicable-stack-version","HDP-2.2.4.2");
     PrerequisiteCheckConfig prerequisiteCheckConfig = 
Mockito.mock(PrerequisiteCheckConfig.class);
     Mockito.when(prerequisiteCheckConfig.getCheckProperties(
@@ -119,14 +119,14 @@ public class YarnTimelineServerStatePreservingCheckTest {
 
     final DesiredConfig desiredConfig = Mockito.mock(DesiredConfig.class);
     Mockito.when(desiredConfig.getTag()).thenReturn("tag");
-    Map<String, DesiredConfig> configMap = new HashMap<String, 
DesiredConfig>();
+    Map<String, DesiredConfig> configMap = new HashMap<>();
     configMap.put("yarn-site", desiredConfig);
     configMap.put("core-site", desiredConfig);
 
     Mockito.when(cluster.getDesiredConfigs()).thenReturn(configMap);
     final Config config = Mockito.mock(Config.class);
     Mockito.when(cluster.getConfig(Mockito.anyString(), 
Mockito.anyString())).thenReturn(config);
-    final Map<String, String> properties = new HashMap<String, String>();
+    final Map<String, String> properties = new HashMap<>();
     Mockito.when(config.getProperties()).thenReturn(properties);
 
     PrerequisiteCheck check = new PrerequisiteCheck(null, null);
@@ -156,7 +156,7 @@ public class YarnTimelineServerStatePreservingCheckTest {
     
Mockito.when(clusterVersionEntity.getRepositoryVersion()).thenReturn(repositoryVersionEntity);
     Mockito.when(m_clusters.getCluster("c1")).thenReturn(cluster);
 
-    Map<String, String> checkProperties = new HashMap<String, String>();
+    Map<String, String> checkProperties = new HashMap<>();
     checkProperties.put("min-applicable-stack-version","HDP-2.2.4.2");
     PrerequisiteCheckConfig prerequisiteCheckConfig = 
Mockito.mock(PrerequisiteCheckConfig.class);
     Mockito.when(prerequisiteCheckConfig.getCheckProperties(
@@ -204,7 +204,7 @@ public class YarnTimelineServerStatePreservingCheckTest {
     
Mockito.when(clusterVersionEntity.getRepositoryVersion()).thenReturn(repositoryVersionEntity);
     Mockito.when(m_clusters.getCluster("c1")).thenReturn(cluster);
 
-    Map<String, String> checkProperties = new HashMap<String, String>();
+    Map<String, String> checkProperties = new HashMap<>();
     checkProperties.put("min-applicable-stack-version", "HDP-2.2.4.2");
     PrerequisiteCheckConfig prerequisiteCheckConfig = 
Mockito.mock(PrerequisiteCheckConfig.class);
     Mockito.when(prerequisiteCheckConfig.getCheckProperties(

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/AndPredicateTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/AndPredicateTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/AndPredicateTest.java
index 278d85f..1611ef5 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/AndPredicateTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/AndPredicateTest.java
@@ -77,10 +77,10 @@ public class AndPredicateTest extends EasyMockSupport {
 
     verifyAll();
 
-    Map<String, Object> expectedMap = new HashMap<String, Object>();
-    expectedMap.put("and", new ArrayList<Map<String, Object>>(
-        Arrays.asList(Collections.<String, Object>singletonMap("nop", "foo"),
-            Collections.<String, Object>singletonMap("nop", "baz"))
+    Map<String, Object> expectedMap = new HashMap<>();
+    expectedMap.put("and", new ArrayList<>(
+      Arrays.asList(Collections.<String, Object>singletonMap("nop", "foo"),
+        Collections.<String, Object>singletonMap("nop", "baz"))
     ));
 
     Assert.assertEquals(expectedMap, actualMap);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/ContainsPredicateTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/ContainsPredicateTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/ContainsPredicateTest.java
index 4d32af1..2190c18 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/ContainsPredicateTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/ContainsPredicateTest.java
@@ -37,8 +37,8 @@ public class ContainsPredicateTest extends EasyMockSupport {
 
   @Test
   public void testEvaluate() {
-    Set<String> data1 = new HashSet<String>(Arrays.asList("ONE", "TWO", 
"THREE"));
-    Set<String> data2 = new HashSet<String>(Arrays.asList("TWO", "THREE"));
+    Set<String> data1 = new HashSet<>(Arrays.asList("ONE", "TWO", "THREE"));
+    Set<String> data2 = new HashSet<>(Arrays.asList("TWO", "THREE"));
 
     ContextTransformer transformer = 
createStrictMock(ContextTransformer.class);
     expect(transformer.transform(EasyMock.<Map<?, 
?>>anyObject())).andReturn(data1).times(1);
@@ -66,8 +66,8 @@ public class ContainsPredicateTest extends EasyMockSupport {
 
     verifyAll();
 
-    Map<String, Object> expectedMap = new HashMap<String, Object>();
-    expectedMap.put("contains", new ArrayList<String>(Arrays.asList("data", 
"ONE")));
+    Map<String, Object> expectedMap = new HashMap<>();
+    expectedMap.put("contains", new ArrayList<>(Arrays.asList("data", "ONE")));
 
     Assert.assertEquals(expectedMap, actualMap);
   }

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/ContextTransformerTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/ContextTransformerTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/ContextTransformerTest.java
index 810234c..c6d962d 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/ContextTransformerTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/ContextTransformerTest.java
@@ -37,7 +37,7 @@ public class ContextTransformerTest extends EasyMockSupport {
 
   @Test
   public void testTransformSimple() {
-    Map<String, Object> context = new HashMap<String, Object>();
+    Map<String, Object> context = new HashMap<>();
     context.put("key", "value");
     context.put("key1", "value1");
     context.put("key2", "value2");
@@ -48,14 +48,14 @@ public class ContextTransformerTest extends EasyMockSupport 
{
 
   @Test
   public void testTransformTree() {
-    Map<String, Object> serviceSite = new HashMap<String, Object>();
+    Map<String, Object> serviceSite = new HashMap<>();
     serviceSite.put("property", "service-site-property");
 
-    Map<String, Object> configurations = new HashMap<String, Object>();
+    Map<String, Object> configurations = new HashMap<>();
     configurations.put("service-site", serviceSite);
     configurations.put("property", "configuration-property");
 
-    Map<String, Object> context = new HashMap<String, Object>();
+    Map<String, Object> context = new HashMap<>();
     context.put("configurations", configurations);
     context.put("property", "context-property");
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/EqualsPredicateTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/EqualsPredicateTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/EqualsPredicateTest.java
index 83c17b3..c463b43 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/EqualsPredicateTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/EqualsPredicateTest.java
@@ -64,8 +64,8 @@ public class EqualsPredicateTest extends EasyMockSupport {
 
     verifyAll();
 
-    Map<String, Object> expectedMap = new HashMap<String, Object>();
-    expectedMap.put("equals", new ArrayList<String>(Arrays.asList("data", 
"value")));
+    Map<String, Object> expectedMap = new HashMap<>();
+    expectedMap.put("equals", new ArrayList<>(Arrays.asList("data", "value")));
 
     Assert.assertEquals(expectedMap, actualMap);
   }

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/NotPredicateTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/NotPredicateTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/NotPredicateTest.java
index 7405ef4..5c30f31 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/NotPredicateTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/NotPredicateTest.java
@@ -64,7 +64,7 @@ public class NotPredicateTest extends EasyMockSupport {
 
     verifyAll();
 
-    Map<String, Object> expectedMap = new HashMap<String, Object>();
+    Map<String, Object> expectedMap = new HashMap<>();
     expectedMap.put("not", Collections.<String, Object>singletonMap("nop", 
"foo"));
 
     Assert.assertEquals(expectedMap, actualMap);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/OrPredicateTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/OrPredicateTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/OrPredicateTest.java
index 0d5ef77..c094d44 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/OrPredicateTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/collections/functors/OrPredicateTest.java
@@ -76,10 +76,10 @@ public class OrPredicateTest extends EasyMockSupport {
 
     verifyAll();
 
-    Map<String, Object> expectedMap = new HashMap<String, Object>();
-    expectedMap.put("or", new ArrayList<Map<String, Object>>(
-        Arrays.asList(Collections.<String, Object>singletonMap("nop", "foo"),
-            Collections.<String, Object>singletonMap("nop", "baz"))
+    Map<String, Object> expectedMap = new HashMap<>();
+    expectedMap.put("or", new ArrayList<>(
+      Arrays.asList(Collections.<String, Object>singletonMap("nop", "foo"),
+        Collections.<String, Object>singletonMap("nop", "baz"))
     ));
 
     Assert.assertEquals(expectedMap, actualMap);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariCustomCommandExecutionHelperTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariCustomCommandExecutionHelperTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariCustomCommandExecutionHelperTest.java
index 9a0300f..71a02f5 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariCustomCommandExecutionHelperTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariCustomCommandExecutionHelperTest.java
@@ -146,7 +146,7 @@ public class AmbariCustomCommandExecutionHelperTest {
     stackInfo.setName("HDP");
     stackInfo.setVersion("2.0.6");
     StackId stackId = new StackId(stackInfo);
-    Map<String, DesiredConfig> desiredConfigMap = new HashMap<String, 
DesiredConfig>();
+    Map<String, DesiredConfig> desiredConfigMap = new HashMap<>();
     Map<PropertyInfo, String> userProperties = new HashMap<>();
     Map<PropertyInfo, String> groupProperties = new HashMap<>();
     PropertyInfo userProperty = new PropertyInfo();
@@ -169,7 +169,7 @@ public class AmbariCustomCommandExecutionHelperTest {
     userProperties.put(userProperty, "zookeeperUser");
     groupProperties.put(groupProperty, "zookeeperGroup");
     Map<String, Set<String>> userGroupsMap = new HashMap<>();
-    userGroupsMap.put("zookeeperUser", new 
HashSet<String>(Arrays.asList("zookeeperGroup")));
+    userGroupsMap.put("zookeeperUser", new 
HashSet<>(Arrays.asList("zookeeperGroup")));
     Cluster cluster = clusters.getCluster("c1");
     EasyMock.expect(configHelper.getPropertiesWithPropertyType(
       stackId, PropertyInfo.PropertyType.USER, cluster, 
desiredConfigMap)).andReturn(userProperties).anyTimes();
@@ -596,7 +596,7 @@ public class AmbariCustomCommandExecutionHelperTest {
     }
   }
   private void setOsFamily(Host host, String osFamily, String osVersion) {
-    Map<String, String> hostAttributes = new HashMap<String, String>();
+    Map<String, String> hostAttributes = new HashMap<>();
     hostAttributes.put("os_family", osFamily);
     hostAttributes.put("os_release_version", osVersion);
 
@@ -616,7 +616,7 @@ public class AmbariCustomCommandExecutionHelperTest {
       dStateStr = desiredState.toString();
     }
     ServiceRequest r1 = new ServiceRequest(clusterName, serviceName, 
dStateStr);
-    Set<ServiceRequest> requests = new HashSet<ServiceRequest>();
+    Set<ServiceRequest> requests = new HashSet<>();
     requests.add(r1);
 
     ServiceResourceProviderTest.createServices(ambariManagementController, 
requests);
@@ -632,7 +632,7 @@ public class AmbariCustomCommandExecutionHelperTest {
     ServiceComponentRequest r = new ServiceComponentRequest(clusterName,
         serviceName, componentName, dStateStr);
     Set<ServiceComponentRequest> requests =
-        new HashSet<ServiceComponentRequest>();
+      new HashSet<>();
     requests.add(r);
     ComponentResourceProviderTest.createComponents(ambariManagementController, 
requests);
   }
@@ -646,7 +646,7 @@ public class AmbariCustomCommandExecutionHelperTest {
     ServiceComponentHostRequest r = new 
ServiceComponentHostRequest(clusterName,
         serviceName, componentName, hostname, dStateStr);
     Set<ServiceComponentHostRequest> requests =
-        new HashSet<ServiceComponentHostRequest>();
+      new HashSet<>();
     requests.add(r);
     ambariManagementController.createHostComponents(requests);
   }

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariHandlerListTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariHandlerListTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariHandlerListTest.java
index 9fe240e..191deca 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariHandlerListTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariHandlerListTest.java
@@ -85,7 +85,7 @@ public class AmbariHandlerListTest {
 
     handlerList.addViewInstance(viewInstanceEntity);
 
-    ArrayList<Handler> handlers = new 
ArrayList<Handler>(Arrays.asList(handlerList.getHandlers()));
+    ArrayList<Handler> handlers = new 
ArrayList<>(Arrays.asList(handlerList.getHandlers()));
 
     Assert.assertTrue(handlers.contains(handler));
 
@@ -112,13 +112,13 @@ public class AmbariHandlerListTest {
 
     handlerList.addViewInstance(viewInstanceEntity);
 
-    ArrayList<Handler> handlers = new 
ArrayList<Handler>(Arrays.asList(handlerList.getHandlers()));
+    ArrayList<Handler> handlers = new 
ArrayList<>(Arrays.asList(handlerList.getHandlers()));
 
     Assert.assertTrue(handlers.contains(handler));
 
     handlerList.removeViewInstance(viewInstanceEntity);
 
-    handlers = new 
ArrayList<Handler>(Arrays.asList(handlerList.getHandlers()));
+    handlers = new ArrayList<>(Arrays.asList(handlerList.getHandlers()));
 
     Assert.assertFalse(handlers.contains(handler));
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariManagementControllerImplTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariManagementControllerImplTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariManagementControllerImplTest.java
index abae5a1..625ac8a 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariManagementControllerImplTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariManagementControllerImplTest.java
@@ -229,7 +229,7 @@ public class AmbariManagementControllerImplTest {
     Cluster cluster = createNiceMock(Cluster.class);
     ClusterResponse response = createNiceMock(ClusterResponse.class);
 
-    Set<ClusterRequest> setRequests = new HashSet<ClusterRequest>();
+    Set<ClusterRequest> setRequests = new HashSet<>();
     setRequests.add(request1);
 
     // expectations
@@ -289,7 +289,7 @@ public class AmbariManagementControllerImplTest {
     Cluster cluster = createNiceMock(Cluster.class);
     Service service = createNiceMock(Service.class);
     ServiceComponent component = createNiceMock(ServiceComponent.class);
-    Map<String, ServiceComponentHost> hostMap = new HashMap<String, 
ServiceComponentHost>();
+    Map<String, ServiceComponentHost> hostMap = new HashMap<>();
     expect(component.getServiceComponentHosts()).andReturn(hostMap);
 
     replay(cluster, service, component, injector);
@@ -380,7 +380,7 @@ public class AmbariManagementControllerImplTest {
     expect(service.getDesiredStackVersion()).andReturn(stackId);
     expect(stackId.getStackName()).andReturn("stack");
     expect(stackId.getStackVersion()).andReturn("1.0");
-    Map<String, ServiceComponent> componentsMap = new HashMap<String, 
ServiceComponent>();
+    Map<String, ServiceComponent> componentsMap = new HashMap<>();
     componentsMap.put("component1", component1);
     componentsMap.put("component2", component2);
     expect(service.getServiceComponents()).andReturn(componentsMap);
@@ -418,7 +418,7 @@ public class AmbariManagementControllerImplTest {
     expect(service.getDesiredStackVersion()).andReturn(stackId);
     expect(stackId.getStackName()).andReturn("stack");
     expect(stackId.getStackVersion()).andReturn("1.0");
-    Map<String, ServiceComponent> componentsMap = new HashMap<String, 
ServiceComponent>();
+    Map<String, ServiceComponent> componentsMap = new HashMap<>();
     componentsMap.put("component1", component1);
     componentsMap.put("component2", component2);
     expect(service.getServiceComponents()).andReturn(componentsMap);
@@ -453,7 +453,7 @@ public class AmbariManagementControllerImplTest {
     // requests
     ClusterRequest request1 = new ClusterRequest(null, "cluster1", "1", 
Collections.<String>emptySet());
 
-    Set<ClusterRequest> setRequests = new HashSet<ClusterRequest>();
+    Set<ClusterRequest> setRequests = new HashSet<>();
     setRequests.add(request1);
 
     // expectations
@@ -504,7 +504,7 @@ public class AmbariManagementControllerImplTest {
     ClusterRequest request3 = new ClusterRequest(null, "cluster3", "1", 
Collections.<String>emptySet());
     ClusterRequest request4 = new ClusterRequest(null, "cluster4", "1", 
Collections.<String>emptySet());
 
-    Set<ClusterRequest> setRequests = new HashSet<ClusterRequest>();
+    Set<ClusterRequest> setRequests = new HashSet<>();
     setRequests.add(request1);
     setRequests.add(request2);
     setRequests.add(request3);
@@ -1028,7 +1028,7 @@ public class AmbariManagementControllerImplTest {
     ServiceComponentHostRequest request1 = new ServiceComponentHostRequest(
         "cluster1", null, "component1", "host1", null);
 
-    Set<ServiceComponentHostRequest> setRequests = new 
HashSet<ServiceComponentHostRequest>();
+    Set<ServiceComponentHostRequest> setRequests = new HashSet<>();
     setRequests.add(request1);
 
     // expectations
@@ -1099,7 +1099,7 @@ public class AmbariManagementControllerImplTest {
         "cluster1", null, "component1", "host1", null);
 
 
-    Set<ServiceComponentHostRequest> setRequests = new 
HashSet<ServiceComponentHostRequest>();
+    Set<ServiceComponentHostRequest> setRequests = new HashSet<>();
     setRequests.add(request1);
 
     // expectations
@@ -1164,7 +1164,7 @@ public class AmbariManagementControllerImplTest {
     request1.setState("INSTALLED");
 
 
-    Set<ServiceComponentHostRequest> setRequests = new 
HashSet<ServiceComponentHostRequest>();
+    Set<ServiceComponentHostRequest> setRequests = new HashSet<>();
     setRequests.add(request1);
 
     // expectations
@@ -1239,7 +1239,7 @@ public class AmbariManagementControllerImplTest {
     request1.setMaintenanceState("ON");
 
 
-    Set<ServiceComponentHostRequest> setRequests = new 
HashSet<ServiceComponentHostRequest>();
+    Set<ServiceComponentHostRequest> setRequests = new HashSet<>();
     setRequests.add(request1);
 
     // expectations
@@ -1331,7 +1331,7 @@ public class AmbariManagementControllerImplTest {
         "cluster1", null, "component3", "host1", null);
 
 
-    Set<ServiceComponentHostRequest> setRequests = new 
HashSet<ServiceComponentHostRequest>();
+    Set<ServiceComponentHostRequest> setRequests = new HashSet<>();
     setRequests.add(request1);
     setRequests.add(request2);
     setRequests.add(request3);
@@ -1433,7 +1433,7 @@ public class AmbariManagementControllerImplTest {
         "cluster1", null, "component3", "host1", null);
 
 
-    Set<ServiceComponentHostRequest> setRequests = new 
HashSet<ServiceComponentHostRequest>();
+    Set<ServiceComponentHostRequest> setRequests = new HashSet<>();
     setRequests.add(request1);
     setRequests.add(request2);
     setRequests.add(request3);
@@ -1538,7 +1538,7 @@ public class AmbariManagementControllerImplTest {
         "cluster1", null, "component3", "host1", null);
 
 
-    Set<ServiceComponentHostRequest> setRequests = new 
HashSet<ServiceComponentHostRequest>();
+    Set<ServiceComponentHostRequest> setRequests = new HashSet<>();
     setRequests.add(request1);
     setRequests.add(request2);
     setRequests.add(request3);
@@ -1645,7 +1645,7 @@ public class AmbariManagementControllerImplTest {
         "cluster1", null, "component3", null, null);
 
 
-    Set<ServiceComponentHostRequest> setRequests = new 
HashSet<ServiceComponentHostRequest>();
+    Set<ServiceComponentHostRequest> setRequests = new HashSet<>();
     setRequests.add(request1);
     setRequests.add(request2);
     setRequests.add(request3);
@@ -1729,7 +1729,7 @@ public class AmbariManagementControllerImplTest {
         "cluster1", null, "component3", "host1", null);
 
 
-    Set<ServiceComponentHostRequest> setRequests = new 
HashSet<ServiceComponentHostRequest>();
+    Set<ServiceComponentHostRequest> setRequests = new HashSet<>();
     setRequests.add(request1);
     setRequests.add(request2);
     setRequests.add(request3);
@@ -1784,7 +1784,7 @@ public class AmbariManagementControllerImplTest {
         "cluster1", null, "component3", "host1", null);
 
 
-    Set<ServiceComponentHostRequest> setRequests = new 
HashSet<ServiceComponentHostRequest>();
+    Set<ServiceComponentHostRequest> setRequests = new HashSet<>();
     setRequests.add(request1);
     setRequests.add(request2);
     setRequests.add(request3);
@@ -1843,10 +1843,10 @@ public class AmbariManagementControllerImplTest {
         "cluster1", null, "component1", null, null);
 
 
-    Set<ServiceComponentHostRequest> setRequests = new 
HashSet<ServiceComponentHostRequest>();
+    Set<ServiceComponentHostRequest> setRequests = new HashSet<>();
     setRequests.add(request1);
 
-    Map<String, ServiceComponentHost> mapHostComponents = new HashMap<String, 
ServiceComponentHost>();
+    Map<String, ServiceComponentHost> mapHostComponents = new HashMap<>();
     mapHostComponents.put("foo", componentHost1);
     mapHostComponents.put("bar", componentHost2);
 
@@ -1926,14 +1926,14 @@ public class AmbariManagementControllerImplTest {
         "cluster1", null, null, null, null);
 
 
-    Set<ServiceComponentHostRequest> setRequests = new 
HashSet<ServiceComponentHostRequest>();
+    Set<ServiceComponentHostRequest> setRequests = new HashSet<>();
     setRequests.add(request1);
 
-    Map<String, Service> mapServices = new HashMap<String, Service>();
+    Map<String, Service> mapServices = new HashMap<>();
     mapServices.put("foo", service1);
     mapServices.put("bar", service2);
 
-    Map<String, ServiceComponentHost> mapHostComponents = new HashMap<String, 
ServiceComponentHost>();
+    Map<String, ServiceComponentHost> mapHostComponents = new HashMap<>();
     mapHostComponents.put("foo", componentHost1);
     mapHostComponents.put("bar", componentHost2);
 
@@ -1998,10 +1998,10 @@ public class AmbariManagementControllerImplTest {
     MaintenanceStateHelper maintHelper = 
createNiceMock(MaintenanceStateHelper.class);
 
     ServiceInfo serviceInfo = createNiceMock(ServiceInfo.class);
-    Map<String, String> hostParams = new HashMap<String, String>();
+    Map<String, String> hostParams = new HashMap<>();
     String osFamily = "testOSFamily";
 
-    Map<String, ServiceOsSpecific> osSpecifics = new HashMap<String, 
ServiceOsSpecific>();
+    Map<String, ServiceOsSpecific> osSpecifics = new HashMap<>();
 
     ServiceOsSpecific.Package package1 = new ServiceOsSpecific.Package();
     package1.setName("testrpm1");
@@ -2010,9 +2010,9 @@ public class AmbariManagementControllerImplTest {
     ServiceOsSpecific.Package package3 = new ServiceOsSpecific.Package();
     package3.setName("testrpm3");
 
-    List<ServiceOsSpecific.Package> packageList1 = new 
ArrayList<ServiceOsSpecific.Package>();
+    List<ServiceOsSpecific.Package> packageList1 = new ArrayList<>();
     packageList1.add(package1);
-    List<ServiceOsSpecific.Package> packageList2 = new 
ArrayList<ServiceOsSpecific.Package>();
+    List<ServiceOsSpecific.Package> packageList2 = new ArrayList<>();
     packageList2.add(package2);
     packageList2.add(package3);
 
@@ -2143,10 +2143,10 @@ public class AmbariManagementControllerImplTest {
   @Test
   public void testSynchronizeLdapUsersAndGroups() throws Exception {
 
-    Set<String> userSet = new HashSet<String>();
+    Set<String> userSet = new HashSet<>();
     userSet.add("user1");
 
-    Set<String> groupSet = new HashSet<String>();
+    Set<String> groupSet = new HashSet<>();
     groupSet.add("group1");
 
     Injector injector = Guice.createInjector(Modules.override(new 
InMemoryDefaultTestModule()).with(new MockModule()));
@@ -2263,7 +2263,7 @@ public class AmbariManagementControllerImplTest {
     f.setAccessible(true);
     f.set(controller, configuration);
 
-    Set<RepositoryRequest> requests = new HashSet<RepositoryRequest>();
+    Set<RepositoryRequest> requests = new HashSet<>();
     RepositoryRequest request = new RepositoryRequest("stackName", 
"stackVersion", "redhat6", "repoId");
     request.setBaseUrl("file:///some/repo");
     requests.add(request);
@@ -2304,23 +2304,23 @@ public class AmbariManagementControllerImplTest {
     expect(cluster.getCurrentStackVersion()).andReturn(stackId);
     expect(service.getName()).andReturn("HDFS").anyTimes();
 
-    Map<String, ServiceComponent> serviceComponents = new HashMap<String, 
ServiceComponent>();
+    Map<String, ServiceComponent> serviceComponents = new HashMap<>();
     serviceComponents.put("NAMENODE", serviceComponent);
     
expect(service.getServiceComponents()).andReturn(serviceComponents).anyTimes();
 
 
-    Map<String, ServiceComponentHost> schMap = new HashMap<String, 
ServiceComponentHost>();
+    Map<String, ServiceComponentHost> schMap = new HashMap<>();
     schMap.put("host1", serviceComponentHost);
     
expect(serviceComponent.getServiceComponentHosts()).andReturn(schMap).anyTimes();
 
     serviceComponentHost.setRestartRequired(true);
 
-    Set<String> services = new HashSet<String>();
+    Set<String> services = new HashSet<>();
     services.add("HDFS");
 
     expect(ambariMetaInfo.getRackSensitiveServicesNames(null, 
null)).andReturn(services);
 
-    Map<String, Service> serviceMap = new HashMap<String, Service>();
+    Map<String, Service> serviceMap = new HashMap<>();
 
     serviceMap.put("HDFS", service);
     expect(cluster.getServices()).andReturn(serviceMap).anyTimes();

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