HBASE-8597 compaction record (probably) can block WAL cleanup forever if region is closed without edits (Sergey)



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1486211 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8573 Store last flushed sequence id for each store of region for Distributed Log Replay

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1486222 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8366 HBaseServer logs the full query

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1486233 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8420 Port HBASE-6874 Implement prefetching for scanners from 0.89-fb

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1486247 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/0.95' into 0.95-gd