YARN-2649. Fixed TestAMRMRPCNodeUpdates test failure. Contributed by Ming Ma
(cherry picked from commit e16e25ab1beac89c8d8be4e9f2a7fbefe81d35f3)
YARN-913 service registry: YARN-2652 add hadoop-yarn-registry package under hadoop-yarn
HDFS-7203. Concurrent appending to the same file can cause data
corruption. Contributed by Kihwal Lee.
CHANGES.txt: move HADOOP-10404 underneath branch 2.6