HDFS-4787. Create a new HdfsConfiguration before each TestDFSClientRetries testcases. Contributed by Tian Hong Wang.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1483235 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-YAHOO-271-trunk-gd