HBASE-11757 Provide a common base abstract class for both RegionObserver and MasterObserver
HBASE-11754 [Shell] Record table property SPLITS_FILE in descriptor (chendihao)
HBASE-11773 Wrong field used for protobuf construction in RegionStates (Andrey Stepachev)

Amending-Author: Andrew Purtell <apurtell@apache.org>