Merge -c 1430682 from trunk to branch-2 to fix YARN-2. Enhanced CapacityScheduler to account for CPU alongwith memory for multi-dimensional resource scheduling. Contributed by Arun C. Murthy.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1430683 13f79535-47bb-0310-9956-ffa450edef68
Merge -c 1430688 from trunk to branch-2 to fix MAPREDUCE-4520. Added support for MapReduce applications to request for CPU cores along-with memory post YARN-2. Contributed by Arun C. Murthy.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1430690 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-4810. Added new admin command options for MR AM. Contributed by Jerry Chen.
svn merge --ignore-ancestry -c 1430707 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1430708 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'branch-2' of github.com:griddynamics/yhadoop-common into branch-2-gd
Merge branch 'branch-2-gd' of github.com:griddynamics/yhadoop-common into fb-YAHOO-159-branch-2-gd