YARN-269. Resource Manager not logging the health_check_script result when taking it out. Contributed by Jason Lowe

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1451341 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4518. Finer grained metrics for HDFS capacity. Contributed by Suresh Srinivas.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1451348 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9336. Allow UGI of current connection to be queried. Contributed by Daryn Sharp.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1451376 13f79535-47bb-0310-9956-ffa450edef68
YARN-406. Fix TestRackResolver to function in networks where "host1" resolves to a valid host. Contributed by Hitesh Shah.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1451391 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd