TEZ-1083.  Enable IFile RLE for DefaultSorter  (Rajesh Balamohan)
TEZ-1637. Improved shuffle error handling across NM restarts.
Contributed by Rajesh Balamohan.
TEZ-1479. Disambiguate (refactor) between
ShuffleInputEventHandlers and Fetchers. (sseth)
TEZ-1665. DAGScheduler should provide a priority range instead of an exact priority (bikas)jps
TEZ-1479 addendum. Revert accidental change from previous commit.
(sseth)
TEZ-1632. NPE at TestPreemption.testPreemptionWithoutSession (Alexander Pivovarov via bikas)
TEZ-1674. Rename configuration parameters related to counters / memory
scaling. (sseth)
TEZ-1176. Set parallelism should end up sending an update to ATS if numTasks are updated at run-time. (hitesh)
TEZ-1658. Additional data generation to Timeline for UI. (hitesh)
TEZ-1676. Fix failing test in TestHistoryEventTimelineConversion. (hitesh)
TEZ-1677. Add Jeff Zhang to team list
TEZ-1584. Restore counters from DAGFinishedEvent when DAG is completed. (zjffdu)
TEZ-1673. Update the default value for allowed node failures, num events
per heartbeat and counter update interval. (sseth)
TEZ-1462. Remove unnecessary SuppressWarnings. (Alexander Pivovarov via hitesh)
TEZ-1633. Fixed expected values in TestTaskRecovery.testRecovery_OneTAStarted. (Alexander Pivovarov and Jeff Zhang via hitesh)
TEZ-1669. yarn-swimlanes.sh throws error post TEZ-1556. (Rajesh Balamohan via hitesh)
TEZ-1633. Addendum patch. Fixed expected values in TestTaskRecovery.testRecovery_OneTAStarted. (Alexander Pivovarov and Jeff Zhang via hitesh)
TEZ-1682. Tez AM hangs at times when there are task failures. (sseth)
TEZ-1683. Do ugi::getGroups only when necessary when checking ACLs. (hitesh)
TEZ-1584. Addenum - Update CHANGES.txt to include TEZ-1584 in 0.5.2 (zjffdu)