Merge r1536250 from branch-2 to branch-2.2 for YARN-1022. Unnecessary INFO logs in AMRMClientAsync (haosdent via bikas)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.2@1536251 13f79535-47bb-0310-9956-ffa450edef68