TEZ-1774 AppLaunched event for Timeline does not have start time set.
TEZ-1770 Handle ConnectExceptions correctly when establishing connections to an NM which may be down.
TEZ-1761 TestRecoveryParser::testGetLastInProgressDAG fails in similar manner to TEZ-1686.
TEZ-1758 TezClient should provide YARN diagnostics when the AM crashes
TEZ-1750 Add a DAGScheduler which schedules tasks only when sources have been scheduled.
TEZ-1749 Increase test timeout for TestLocalMode.testMultipleClientsWithSession
TEZ-1745 TestATSHistoryLoggingService::testATSHistoryLoggingServiceShutdown can be flaky.
TEZ-1747 Increase test timeout for TestSecureShuffle.
TEZ-1746 Flaky test in TestVertexImpl and TestExceptionPropagation.
TEZ-1742 Improve response time of internal preemption.
