zeppelin git commit: ZEPPELIN-1270. Remove getting SQLContext from SparkSession.wrapped()

[moon]

Repository: zeppelin
Updated Branches:
  refs/heads/master 471025d1d -> b6310ada1


ZEPPELIN-1270. Remove getting SQLContext from SparkSession.wrapped()

### What is this PR for?
SparkSession.wrapped is only for spark 2.0 preview, it is not supported in 
spark 2.0 release. So I think we can remove that piece of code. Otherwise we 
will get the following error in log which might be a little confusing.
```
08:05:44,946 - Thread(pool-2-thread-3) - (Utils.java:40) - 
org.apache.spark.sql.SparkSession.wrapped()
java.lang.NoSuchMethodException: org.apache.spark.sql.SparkSession.wrapped()
    at java.lang.Class.getMethod(Class.java:1786)
    at org.apache.zeppelin.spark.Utils.invokeMethod(Utils.java:38)
    at org.apache.zeppelin.spark.Utils.invokeMethod(Utils.java:33)
```

### What type of PR is it?
[Improvement]

### Todos
* [ ] - Task

### What is the Jira issue?
* https://issues.apache.org/jira/browse/ZEPPELIN-1270

### How should this be tested?
Check the log and the above error is gone.

### Screenshots (if appropriate)

### Questions:
* Does the licenses files need update? No
* Is there breaking changes for older versions? No
* Does this needs documentation? No

Author: Jeff Zhang <zjf...@apache.org>

Closes #1269 from zjffdu/ZEPPELIN-1270 and squashes the following commits:

a685e66 [Jeff Zhang] ZEPPELIN-1270. Remove getting SQLContext from 
SparkSession.wrapped()


Project: http://git-wip-us.apache.org/repos/asf/zeppelin/repo
Commit: http://git-wip-us.apache.org/repos/asf/zeppelin/commit/b6310ada
Tree: http://git-wip-us.apache.org/repos/asf/zeppelin/tree/b6310ada
Diff: http://git-wip-us.apache.org/repos/asf/zeppelin/diff/b6310ada

Branch: refs/heads/master
Commit: b6310ada120ec385d7e4e4264a69a238dd87d045
Parents: 471025d
Author: Jeff Zhang <zjf...@apache.org>
Authored: Wed Aug 3 08:20:03 2016 +0800
Committer: Lee moon soo <m...@apache.org>
Committed: Sun Aug 7 08:54:36 2016 -0700

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 .../main/java/org/apache/zeppelin/spark/SparkInterpreter.java   | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)
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http://git-wip-us.apache.org/repos/asf/zeppelin/blob/b6310ada/spark/src/main/java/org/apache/zeppelin/spark/SparkInterpreter.java
----------------------------------------------------------------------
diff --git 
a/spark/src/main/java/org/apache/zeppelin/spark/SparkInterpreter.java 
b/spark/src/main/java/org/apache/zeppelin/spark/SparkInterpreter.java
index 89d24e6..ff0f14c 100644
--- a/spark/src/main/java/org/apache/zeppelin/spark/SparkInterpreter.java
+++ b/spark/src/main/java/org/apache/zeppelin/spark/SparkInterpreter.java
@@ -238,10 +238,7 @@ public class SparkInterpreter extends Interpreter {
    */
   private SQLContext getSQLContext_2() {
     if (sqlc == null) {
-      sqlc = (SQLContext) Utils.invokeMethod(sparkSession, "wrapped");
-      if (sqlc == null) {
-        sqlc = (SQLContext) Utils.invokeMethod(sparkSession, "sqlContext");
-      }
+      sqlc = (SQLContext) Utils.invokeMethod(sparkSession, "sqlContext");
     }
     return sqlc;
   }