hbase-9098: During recovery use ZK as the source of truth for region state

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1510101 13f79535-47bb-0310-9956-ffa450edef68
hbase-9096: Disable split during log replay

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1510105 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd