YARN-891. Modified ResourceManager state-store to remember completed applications so that clients can get information about them post RM-restart. Contributed by Jian He.
svn merge --ignore-ancestry -c 1537560 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1537561 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-2' into branch-2-gd
Merge remote branch 'origin/branch-2-gd' into fb-HADOOP-9166-branch-2-gd