YARN-935. Correcting pom.xml to build applicationhistoryserver module successfully. Contributed by Zhijie Shen.
svn merge --ignore-ancestry -c 1556686 ../YARN-321


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1562156 13f79535-47bb-0310-9956-ffa450edef68