svn merge -c 1575049 from trunk for MAPREDUCE-5780. SliveTest should use the specified path to get the particular FileSystem instead of using the default FileSystem.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1575055 13f79535-47bb-0310-9956-ffa450edef68