YARN-2158. Improved assertion messages of TestRMWebServicesAppsModification. Contributed by Varun Vasudev.
svn merge --ignore-ancestry -c 1608667 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1608668 13f79535-47bb-0310-9956-ffa450edef68