YARN-1077. Fixed TestContainerLaunch test failure on Windows. Contributed by Chuan Liu.
svn merge --ignore-ancestry -c 1519333 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1519334 13f79535-47bb-0310-9956-ffa450edef68