Merge r1556318 from trunk. YARN-1293. Fixed TestContainerLaunch#testInvalidEnvSyntaxDiagnostics failure caused by non-English system locale. Contributed by Tsuyoshi OZAWA.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1556319 13f79535-47bb-0310-9956-ffa450edef68