-code review: HBASE-7268 correct local region location cache information can be overwritten w/stale information from an old server
Please take a look at HBASE-7268 where fix for preventing stale location
information from overwriting region location cache is proposed.
This is an incompatible change - we are introducing a new column in .META.
table, tentatively named 'openseqnum'.
This column stores the latest sequence Id for the underlying region when
region is opened.
Please provide your opinion on the approach.