spark git commit: [SPARK-12021][STREAMING][TESTS] Fix the potential dead-lock in StreamingListenerSuite

Repository: spark Updated Branches: refs/heads/branch-1.6 dfc98fac9 -> 996635793 [SPARK-12021][STREAMING][TESTS] Fix the potential dead-lock in StreamingListenerSuite In StreamingListenerSuite."don't call ssc.stop in listener", after the main thread calls `ssc.stop()`,

spark git commit: [SPARK-12021][STREAMING][TESTS] Fix the potential dead-lock in StreamingListenerSuite

Repository: spark Updated Branches: refs/heads/master ba02f6cb5 -> f57e6c9ef [SPARK-12021][STREAMING][TESTS] Fix the potential dead-lock in StreamingListenerSuite In StreamingListenerSuite."don't call ssc.stop in listener", after the main thread calls `ssc.stop()`,