HBASE-8352 Rename '.snapshot' directory (Ted Yu)



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1468671 13f79535-47bb-0310-9956-ffa450edef68
CHANGES.txt 0.94.7RC0

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1468694 13f79535-47bb-0310-9956-ffa450edef68