@AfterClass
    public static void tearDown() {
        registry.destroy();
        registry = null;
    }
@author <a href="mailto:zhanggeng.zg@antfin.com">GengZhang</a>
registry/registry-zk/src/test/java/com/alipay/sofa/rpc/registry/zk/ZookeeperRegistryTest.java