HDFS-4434. Provide a mapping from INodeId to INode. Contributed by Suresh Srinivas.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1469644 13f79535-47bb-0310-9956-ffa450edef68
YARN-441. Removed unused utility methods for collections from two API records. Contributed by Xuan Gong.
MAPREDUCE-5163. Update MR App to not use API utility methods for collections after YARN-441. Contributed by Xuan Gong.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1469657 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-HDFS-4312-trunk-gd