@Override
    public void handleRegionEndKeyNotEmpty(byte[] curEndKey) throws IOException {
      errors.reportError(HbckErrorReporter.ERROR_CODE.LAST_REGION_ENDKEY_NOT_EMPTY,
        "Last region should end with an empty key. You need to "
          + "create a new region and regioninfo in HDFS to plug the hole.",
        getTableInfo());
    }
Returns descriptor common to all regions. null if are none or multiple!
hbase-server/src/main/java/org/apache/hadoop/hbase/util/HbckTableInfo.java