HDFS-6462. NFS: fsstat request fails with the secure hdfs. Contributed by Brandon Li

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1598405 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6356. Fix typo in DatanodeLayoutVersion. Contributed by Tulasi G.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1598408 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6447. balancer should timestamp the completion message. Contributed by Juan Yu.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1598411 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10639. FileBasedKeyStoresFactory initialization is not using default for SSL_REQUIRE_CLIENT_CERT_KEY. (tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1598413 13f79535-47bb-0310-9956-ffa450edef68