HBASE-11838 Enable PREFIX_TREE in integration tests
HBASE-11997 CopyTable with bulkload (Yi Deng)
HBASE-12191 Make TestCacheOnWrite faster.
HBASE-12193 Add missing docbook file to git
HBASE-12016 Reduce number of versions in Meta table. Make it configurable (Andrey Stepachev)
HBASE-12195 Fix dev-support/findHangingTests (Manukranth Kolloju)
HBASE-12196 SSH should retry in case failed to assign regions