YARN-1056. Remove dual use of string 'resourcemanager' in yarn.resourcemanager.connect.{max.wait.secs|retry_interval.secs}. Contributed by Karthik Kambatla.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1514135 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9875.  TestDoAsEffectiveUser can fail on JDK 7.  (Aaron T. Myers via Colin Patrick McCabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1514147 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4898. BlockPlacementPolicyWithNodeGroup.chooseRemoteRack() fails to properly fallback to local rack.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1514156 13f79535-47bb-0310-9956-ffa450edef68