1. non-simplify mode:
```
dubbo://120.0.0.1:20880/org.apache.dubbo.demo.DemoService?key=value
```
the store path of ZK will be: `/dubbo/porg.apache.dubbo.demo.DemoService/url`

2. simplify mode:
```
dubbo://120.0.0.1:20880/org.apache.dubbo.demo.DemoService?key=value
```
the store path of ZK will be: `/dubbo/porg.apache.dubbo.demo.DemoService/url`

3. simplify mode with path specified:
```
dubbo://120.0.0.1:20880/path-value?key=value
```
the store path of ZK will be: `/dubbo/path-value/url`
delayService.export();
        assertTrue(delayService.getExportedUrls().isEmpty());
        
        TimeUnit.MILLISECONDS.sleep(delayService.getDelay() + 300);
        assertThat(delayService.getExportedUrls(), hasSize(1));
    }
    @Test
    @Disabled("cannot pass in travis")
    public void testUnexport() throws Exception {
        System.setProperty(Constants.SHUTDOWN_WAIT_KEY, "0");
        try {
            service.export();
            service.unexport();
            Thread.sleep(1000);
            Mockito.verify(exporter, Mockito.atLeastOnce()).unexport();
        } finally {
            System.clearProperty(Constants.SHUTDOWN_TIMEOUT_KEY);
        }
    }
    @Test
    public void testInterfaceClass() throws Exception {
        ServiceConfig<Greeting> service = new ServiceConfig<Greeting>();
        service.setInterface(Greeting.class.getName());
        service.setRef(Mockito.mock(Greeting.class));
        assertThat(service.getInterfaceClass() == Greeting.class, is(true));
        service = new ServiceConfig<Greeting>();
        service.setRef(Mockito.mock(Greeting.class, withSettings().extraInterfaces(GenericService.class)));
        assertThat(service.getInterfaceClass() == GenericService.class, is(true));
    }
    @Test