HBASE-9208 ReplicationLogCleaner slow at large scale

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1518465 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/branches/0.95@1518468 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/0.95' into 0.95-gd
Merge remote branch 'origin/0.95-gd' into fb-YAHOO-323-0.95-gd