HADOOP-8545 findbugs patches from the final -037 patch

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1527188 13f79535-47bb-0310-9956-ffa450edef68
YARN-1246. Added application finish-status to ApplicationSummary for the sake of testing given ApplicationHistoryServer is not yet ready. Contributed by Arpit Gupta.
svn merge --ignore-ancestry -c 1527205 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1527206 13f79535-47bb-0310-9956-ffa450edef68