Merge HDFS-2006 HDFS XAttrs branch to Trunk


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1596575 13f79535-47bb-0310-9956-ffa450edef68
YARN-1938. Added kerberos login for the Timeline Server. Contributed by Zhijie Shen.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1596710 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6396. Remove support for ACL feature from INodeSymlink. Contributed by Charles Lamb.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1596713 13f79535-47bb-0310-9956-ffa450edef68
YARN-2081. Fixed TestDistributedShell failure after YARN-1962. Contributed by Zhiguo Hong.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1596724 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6409. Fix typo in log message about NameNode layout version upgrade. Contributed by Chen He.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1596739 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6433. Replace BytesMoved class with AtomicLong. Contributed by Benoy Antony.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1596742 13f79535-47bb-0310-9956-ffa450edef68
YARN-2017. Merged some of the common scheduler code. Contributed by Jian He.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1596753 13f79535-47bb-0310-9956-ffa450edef68
YARN-2089. FairScheduler: QueuePlacementPolicy and QueuePlacementRule are missing audience annotations. (Zhihai Xu via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1596765 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6438. DeleteSnapshot should be a DELETE request in WebHdfs. Contributed by Jing Zhao.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1596772 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6423. Diskspace quota usage should be updated when appending data to partial block. Contributed by Jing Zhao.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1596774 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch 'apache/trunk' into archival2