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.
svn merge --ignore-ancestry -c 1565805 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1565806 13f79535-47bb-0310-9956-ffa450edef68