Merge r1606407 from trunk. YARN-614. Changed ResourceManager to not count disk failure, node loss and RM restart towards app failures. Contributed by Xuan Gong

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1606408 13f79535-47bb-0310-9956-ffa450edef68