HBASE-9208 ReplicationLogCleaner slow at large scale

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1518466 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9110 Meta region edits not recovered while migrating to 0.96.0

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1518467 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9110 Meta region edits not recovered while migrating to 0.96.0; REVERT

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1518469 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9110 Meta region edits not recovered while migrating to 0.96.0; PUT BACK

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1518470 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-HBASE-8559-trunk-gd