HBASE-7725: Add ability to create custom compaction request

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1448449 13f79535-47bb-0310-9956-ffa450edef68
HBASE-7883 Update memstore size when removing the entries in append operation (Himanshu)



git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1448480 13f79535-47bb-0310-9956-ffa450edef68
Pre-trunk-merging sync of trunk into snapshots branch


git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/hbase-7290v2@1448497 13f79535-47bb-0310-9956-ffa450edef68