@VisibleForTesting
  static Configuration getDefaultConf() {
    Configuration config = new Configuration();
    config.addResource(FED_BALANCE_DEFAULT_XML);
    config.addResource(FED_BALANCE_SITE_XML);
    return config;
  }
@Test
  public void testLoadFedBalanceDefaultConf() {
    Configuration conf = FedBalance.getDefaultConf();
    assertNotNull(conf.get(SCHEDULER_JOURNAL_URI));
    assertNotNull(conf.get(WORK_THREAD_NUM));
  }