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-tracking branch 'origin/trunk-gd' into fb-YAHOO-238-trunk-gd

Conflicts:
	hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestCheckpoint.java