CHANGES.txt for 0.94.12RC2

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1524850 13f79535-47bb-0310-9956-ffa450edef68
CHANGES.txt for 0.94.12RC2 take2

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1524861 13f79535-47bb-0310-9956-ffa450edef68