MAPREDUCE-5229. Put back FileOutputCommitter.TEMP_DIR_NAME in mapreduce for binary compatibility with 1.x APIs. Contributed by Zhijie Shen.
svn merge --ignore-ancestry -c 1488621 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1488623 13f79535-47bb-0310-9956-ffa450edef68