fix UT failure for com.alibaba.dubbo.registry.dubbo.RegistryDirectoryTest#testNotifyRouterUrls

Author: beiwei30

dubbo-registry/dubbo-registry-default/src/test/java/com/alibaba/dubbo/registry/dubbo/RegistryDirectoryTest.java

@@ -550,12 +550,12 @@ public void testNotifyRouterUrls() {
         List<Router> routers = registryDirectory.getRouters();
         //default invocation selector
         Assert.assertEquals(1+1, routers.size());
-        Assert.assertEquals(ScriptRouter.class, routers.get(1).getClass());
+        Assert.assertTrue(ScriptRouter.class == routers.get(1).getClass() || ScriptRouter.class == routers.get(0).getClass());
 
         registryDirectory.notify(new ArrayList<URL>());
         routers = registryDirectory.getRouters();
         Assert.assertEquals(1 + 1, routers.size());
-        Assert.assertEquals(ScriptRouter.class, routers.get(1).getClass());
+        Assert.assertTrue(ScriptRouter.class == routers.get(1).getClass() || ScriptRouter.class == routers.get(0).getClass());
 
         serviceUrls.clear();
         serviceUrls.add(routerurl.addParameter(Constants.ROUTER_KEY, Constants.ROUTER_TYPE_CLEAR));