@Test
 public void testProperties() {
   final Properties properties = config.getProperties();
   assertNotNull(properties);
   assertEquals("5", properties.get(GroupProperties.PROP_MERGE_FIRST_RUN_DELAY_SECONDS));
   assertEquals("5", properties.get(GroupProperties.PROP_MERGE_NEXT_RUN_DELAY_SECONDS));
   final Config config2 = instance.getConfig();
   final Properties properties2 = config2.getProperties();
   assertNotNull(properties2);
   assertEquals("5", properties2.get(GroupProperties.PROP_MERGE_FIRST_RUN_DELAY_SECONDS));
   assertEquals("5", properties2.get(GroupProperties.PROP_MERGE_NEXT_RUN_DELAY_SECONDS));
 }
 @Before
 public void before() {
   config = instance.getConfig();
 }