YARN-1381. Same relaxLocality appears twice in exception message of AMRMClientImpl#checkLocalityRelaxationConflict() (Ted Yu via Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.2@1537635 13f79535-47bb-0310-9956-ffa450edef68