static GetRegionInfoResponse getRegionInfoResponse(final MasterProcedureEnv env,
    final ServerName regionLocation, final RegionInfo hri) throws IOException {
    return getRegionInfoResponse(env, regionLocation, hri, false);
  }
Raw call to remote regionserver to get info on a particular region.
@throws IOException Let it out so can report this IOE as reason for failure
hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignmentManagerUtil.java