HDFS-6208. DataNode caching can leak file descriptors. Contributed by Chris Nauroth.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1586154 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6225. Remove the o.a.h.hdfs.server.common.UpgradeStatusReport. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1586181 13f79535-47bb-0310-9956-ffa450edef68
YARN-1910. Fixed a race condition in TestAMRMTokens that causes the test to fail more often on Windows. Contributed by Xuan Gong.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1586192 13f79535-47bb-0310-9956-ffa450edef68