YARN-1689. Made RMAppAttempt get killed when RMApp is at ACCEPTED. Contributed by Vinod Kumar Vavilapalli.
svn merge --ignore-ancestry -c 1565497 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.3@1565500 13f79535-47bb-0310-9956-ffa450edef68