TEZ-1961: Remove misleading exception "No running dag" from AM logs.

TEZ-2863: Container, node, and logs not available in UI for tasks that fail to launch.

TEZ-2963: RecoveryService#handleSummaryEvent exception with HDFS transparent encryption & Kerberos authentication.

TEZ-3066: TaskAttemptFinishedEvent ConcurrentModificationException in recovery or history logging services.

TEZ-3101: Tez UI: Task attempt log link doesn't have the correct protocol.

TEZ-3117: Deadlock in Edge and Vertex code.

TEZ-3123: Containers can get re-used even with conflicting local resources.

TEZ-3128: Avoid stopping containers on the AM shutdown thread.

TEZ-3137: Tez task failed with illegal state exception.

TEZ-3156: Tez client keeps trying to talk to RM even if RM does not know about the application.

TEZ-3177: Non-DAG events should use the session domain or no domain if the data does not need protection.

TEZ-3189: Pre-warm dags should not be counted in submitted dags count by DAGAppMaster.

TEZ-2307: Possible wrong error message when submitting new DAG.

TEZ-2886: Ability to merge AM credentials with DAG credentials.

TEZ-2898: Tez tools: swimlanes.py is broken.

TEZ-2900: Ignore V_INPUT_DATA_INFORMATION when vertex is in Failed/Killed/Error.

TEZ-3017: HistoryACLManager does not have a close method for cleanup.

TEZ-3025: InputInitializer creation should use the DAG GUI.

TEZ-3032: Incorrect start time in different events for DAG history events.

TEZ-3037: History URL should be set regardless of which history logging service is enabled.

TEZ-3126: Log reason for not reducing parallelism.