YARN-926. Modified ContainerManagerProtcol APIs to take in requests for multiple containers. Contributed by Jian He.
MAPREDUCE-5412. Update MR app to use multiple containers API of ContainerManager after YARN-926. Contributed by Jian He.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1506391 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9763. Extends LightWeightGSet to support eviction of expired elements. Contributed by Tsz Wo (Nicholas) SZE.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1506405 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5020. Make DatanodeProtocol#blockReceivedAndDeleted idempotent. Contributed by Jing Zhao.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1506421 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-HADOOP-9281-trunk-gd