HADOOP-8944. Shell command fs -count should include human readable option (Jonathan Allen via aw)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1617775 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6567. Normalize the order of public final in HdfsFileStatus. Contributed by Tassapol Athiapinya.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1617779 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6847. Avoid timeouts for replaceBlock() call by sending intermediate responses to Balancer (Contributed by Vinayakumar B.)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1617784 13f79535-47bb-0310-9956-ffa450edef68