HBASE-6865 Snapshot File Cleaners (Jesse Yates)



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/hbase-7290@1445783 13f79535-47bb-0310-9956-ffa450edef68
HBASE-6777 Snapshot Restore Interface (Matteo Bertozzi)


git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/hbase-7290@1445784 13f79535-47bb-0310-9956-ffa450edef68