Move HADOP-7101 from 0.22 section to 0.23

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1455948 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4593. TestSaveNamespace fails on Windows. Contributed by Arpit Agarwal.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1455956 13f79535-47bb-0310-9956-ffa450edef68