@Test
  public void testGetCoordinatorStreamStoreFactoryWithNonZkJobCoordinator() {
    MapConfig mapConfig = new MapConfig(
        ImmutableMap.of(
            JobConfig.JOB_DEFAULT_SYSTEM, "test-system",
            JobCoordinatorConfig.JOB_COORDINATOR_FACTORY, PassthroughJobCoordinatorFactory.class.getName()));
    Optional<MetadataStoreFactory> metadataStoreFactory =
        LocalApplicationRunner.getDefaultCoordinatorStreamStoreFactory(mapConfig);
    assertFalse(metadataStoreFactory.isPresent());
  }
Default metadata store factory be null if job coordinator system or default system defined and a non ZkJobCoordinator
job coordinator is used.
samza-core/src/test/java/org/apache/samza/runtime/TestLocalApplicationRunner.java