MAPREDUCE-1979. Fixes 'Output directory already exists' error in gridmix when gridmix.output.directory is not defined. Contributed by Ravi Gummadi

git-svn-id: https://svn.apache.org/repos/asf/hadoop/mapreduce/trunk@996418 13f79535-47bb-0310-9956-ffa450edef68
3 files changed