HDFS-4693. Some test cases in TestCheckpoint do not clean up after themselves. Contributed by Arpit Agarwal and Suresh.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1468457 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5015. Coverage fix for org.apache.hadoop.mapreduce.tools.CLI (Aleksey Gorshkov via tgraves)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1468483 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-YAHOO-259-trunk-gd