Merge change r1550011 from trunk: Move HDFS-5257,HDFS-5427,HDFS-5443,HDFS-5476,HDFS-5425,HDFS-5474,HDFS-5504,HDFS-5428 into branch-2.3 section.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1550012 13f79535-47bb-0310-9956-ffa450edef68