YARN-1023. Added Webservices REST APIs support for Application History. Contributed Zhijie Shen.
svn merge --ignore-ancestry -c 1556749 ../YARN-321


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1562203 13f79535-47bb-0310-9956-ffa450edef68