HDFS-5577. NFS user guide update. Contributed by Brandon Li

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1546210 13f79535-47bb-0310-9956-ffa450edef68
YARN-1239. Modified ResourceManager state-store implementations to start storing version numbers. Contributed by Jian He.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1546229 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5563. NFS gateway should commit the buffered data when read request comes after write to the same file. Contributed by Brandon Li

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1546233 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5562. TestCacheDirectives and TestFsDatasetCache should stub out native mlock. Contributed by Colin Patrick McCabe and Akira Ajisaka.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1546246 13f79535-47bb-0310-9956-ffa450edef68