merge -r 1161991:1161992 Merging from trunk to branch-0.23 to fix HDFS-395

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1441117 13f79535-47bb-0310-9956-ffa450edef68
Merging r1196676 and r1197801 from trunk to branch-0.23 to fix HDFS-2477

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1441131 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'branch-0.23' of github.com:griddynamics/yhadoop-common into branch-0.23-gd
Merge branch 'branch-0.23-gd' of github.com:griddynamics/yhadoop-common into fb-YAHOO-159-branch-0.23-gd