HADOOP-10562: Merging r1592003 from branch-2 to branch-2.4.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1596374 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10562. Fix CHANGES.txt

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1596376 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10562. Fix CHANGES.txt entry again

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1596389 13f79535-47bb-0310-9956-ffa450edef68
YARN-2081. Fixed TestDistributedShell failure after YARN-1962. Contributed by Zhiguo Hong.
svn merge --ignore-ancestry -c 1596724 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1596726 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6411. Merging change r1597896 from branch-2

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