Remove @Deprecated logic for hbase-mapping.xml

  @Deprecated
  private static final String DEPRECATED_MAPPING_FILE = "hbase-mapping.xml";
...
      try {
        mapping = readMapping(getConf().get(PARSE_MAPPING_FILE_KEY, DEPRECATED_MAPPING_FILE));
        LOG.warn("{} is deprecated, please rename the file to {}", DEPRECATED_MAPPING_FILE, DEFAULT_MAPPING_FILE);
      } catch (FileNotFoundException ex1) {
        LOG.error(ex1.getMessage(), ex1);
        //throw (ex1); //throw the original exception
      } catch (Exception ex1) {
        LOG.warn("{} is deprecated, please rename the file to {}", DEPRECATED_MAPPING_FILE, DEFAULT_MAPPING_FILE);
        throw new RuntimeException(ex1);
      }