YARN-1493,YARN-1490,YARN-1041, YARN-1166,YARN-1566,YARN-1689,YARN-1661 are reverted from branch-2.3. Updating YARN's CHANGES.txt.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1565805 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5882. TestAuditLogs is flaky (jxiang via cmccabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1565840 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5900. Cannot set cache pool limit of unlimited via CacheAdmin. Contributed by Andrew Wang.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1565841 13f79535-47bb-0310-9956-ffa450edef68
Merging r1565757 through r1565853 from trunk

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