HBASE-11773 Wrong field used for protobuf construction in RegionStates (Andrey Stepachev)

Amending-Author: Andrew Purtell <apurtell@apache.org>
HBASE-11774 Avoid allocating unnecessary tag iterators
HBASE-11742 (Backport HBASE-7987 and HBASE-11185 to 0.98) (Esteban Gutierrez and Matteo Bertozzi)