Clear console of all Error/Exception traces + Few identified testcases

Here are few identified testcases that print error traces on console indirecctly:

Testcase identified by Justin-

-> at org.apache.lens.server.stats.TestStatisticsLogPartitionHandler.configureHiveTables(TestStatisticsLogPartitionHandler.java:128)
-> at org.apache.lens.server.stats.TestStatisticsLogPartitionHandler.testPartitionHandler(TestStatisticsLogPartitionHandler.java:63)

Other similar testcases:

-> at org.apache.lens.driver.hive.TestHiveDriver.testCancelAsyncQuery(TestHiveDriver.java:496)
-> at org.apache.lens.driver.hive.TestHiveDriver.testEstimateNativeFailingQuery(TestHiveDriver.java:661)
-> at org.apache.lens.server.metastore.CubeMetastoreServiceImpl.getLatestDateOfCube(CubeMetastoreServiceImpl.java:1354)
-> at org.apache.lens.server.metastore.MetastoreResource.getLatestDateOfCube(MetastoreResource.java:1550)
-> at org.apache.lens.server.metastore.TestMetastoreService.testDimension(TestMetastoreService.java:1220)
-> at org.apache.lens.server.metastore.TestMetastoreService.testDimension(TestMetastoreService.java:1229)
-> at org.apache.lens.server.metastore.TestMetastoreService.testDropCube(TestMetastoreService.java:766)
-> at org.apache.lens.server.metastore.TestMetastoreService.testDropCube(TestMetastoreService.java:780)
-> at org.apache.lens.server.session.TestSessionClassLoaders.testClassLoaderMergeAfterAddResources(TestSessionClassLoaders.java:181)
-> at org.apache.lens.server.session.TestSessionClassLoaders.testClassLoaderMergeAfterAddResources(TestSessionClassLoaders.java:204)
-> at org.apache.lens.server.session.TestSessionClassLoaders.testClassLoaderMergeAfterAddResources(TestSessionClassLoaders.java:282)
-> at org.apache.lens.server.session.TestSessionResource.testServerMustRestartOnManualDeletionOfAddedResources(TestSessionResource.java:365)
-> at org.apache.lens.server.stats.TestStatisticsLogPartitionHandler.testPartitionHandler(TestStatisticsLogPartitionHandler.java:63)
-> at org.apache.lens.server.TestServerRestart.testQueryService(TestServerRestart.java:188)
-> at org.apache.lens.server.TestServerRestart.testSessionRestart(TestServerRestart.java:393)