HBASE-10962 Decouple region opening (HM and HRS) from ZK (Mikhail Antonov)
HBASE-11302 ReplicationSourceManager#sources is not thread safe (Qianxi Zhang)
HBASE-11305 Remove bunch of unused imports in HConnectionManager (Mikhail Antonov)
hbase-8763: Combine MVCC and SeqId
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