HDFS-5804. HDFS NFS Gateway fails to mount and proxy when using Kerberos. Contributed by Abin Shahab.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1563323 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5859.  DataNode#checkBlockToken should check block tokens even if security is not enabled (cmccabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1563328 13f79535-47bb-0310-9956-ffa450edef68
YARN-1633. Defined user-facing entity, entity-info and event objects related to Application Timeline feature. Contributed by Zhijie Shen.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1563356 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5746.  Add ShortCircuitSharedMemorySegment (cmccabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1563362 13f79535-47bb-0310-9956-ffa450edef68