YARN-1258: Move to 2.2.1 in CHANGES.txt

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1534307 13f79535-47bb-0310-9956-ffa450edef68
Reverting "YARN-1258: Move to 2.2.1 in CHANGES.txt" because it contained unintended changes

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1534308 13f79535-47bb-0310-9956-ffa450edef68
YARN-1258: Move to 2.2.1 in CHANGES.txt

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1534310 13f79535-47bb-0310-9956-ffa450edef68
YARN-1288. Make Fair Scheduler ACLs more user friendly (Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1534315 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5382. Implement the UI of browsing filesystems in HTML 5 page. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1534368 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5347. Add HDFS NFS user guide. Contributed by Brandon Li

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1534377 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4885. Improve the verifyBlockPlacement() API in BlockPlacementPolicy. Contributed by Junping Du


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1534426 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9291. enhance unit-test coverage of package o.a.h.metrics2 (Ivan A. Veselovsky via jeagles)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1534474 13f79535-47bb-0310-9956-ffa450edef68
YARN-1331. yarn.cmd exits with NoClassDefFoundError trying to run rmadmin or logs. Contributed by Chris Nauroth.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1534499 13f79535-47bb-0310-9956-ffa450edef68
YARN-1315. TestQueueACLs should also test FairScheduler (Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1534508 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5400. DFS_CLIENT_MMAP_CACHE_THREAD_RUNS_PER_TIMEOUT constant is set to the wrong value (Colin Patrick McCabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1534655 13f79535-47bb-0310-9956-ffa450edef68
Merging r1534279 through r1534706 from trunk to branch HDFS-2832

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