YARN-696. Changed RMWebservice apps call to take in multiple application states. Contributed by Trevor Lorimer.
svn merge --ignore-ancestry -c 1520736 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.1-beta@1520739 13f79535-47bb-0310-9956-ffa450edef68