In 0.96, we are going to move to PB. But HRegionInterface is still there
in case someone needs it.
That means we need to maintain both implementations. It also prevents us
moving to PB internally.
I filed HBASE-5889 to address it. In reviewing the patch, Ted brought a
To those non-bundled (third-party) HBase client(s) using HRegionInterface
directly, such as
asynchbase, should 0.96 be a singularity too?