Merge -c 1463653 from trunk to branch-2 for YARN-382. SchedulerUtils improve way normalizeRequest sets the resource capabilities (Zhijie Shen via bikas)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1463656 13f79535-47bb-0310-9956-ffa450edef68