HADOOP-8562. Merge r1464780 HDFS-4625, r1465869 YARN-557, r1466148 HDFS-4674, r1466306 HADOOP-9437, r1466746 YARN-487

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1485934 13f79535-47bb-0310-9956-ffa450edef68