## 问题描述
使用如下方式配置RegistryConfig bean时

```java
    @Bean
    public RegistryConfig registryConfig() {
        RegistryConfig registryConfig = new RegistryConfig();
        registryConfig.setProtocol("zookeeper");
        registryConfig.setAddress("localhost");
        registryConfig.setPort(2181);
        return registryConfig;
    }
```

提示无法与zookeeper建立连接，调试代码发现，zookeeper链接为

`zookeeper://localhost:9090/ConfigCenterConfig?check=true&config-file=dubbo.properties&group=dubbo&highest-priority=false&namespace=dubbo&timeout=3000`

使用了9090端口，未使用2181端口，registryConfig.setPort()不生效。

对比测试，使用registryConfig.setAddress("localhost:2181")方式可以生效。


);
            }
            try {
                environment.setConfigCenterFirst(configCenter.isHighestPriority());
                environment.updateExternalConfigurationMap(parseProperties(configContent));
                environment.updateAppExternalConfigurationMap(parseProperties(appConfigContent));
            } catch (IOException e) {
                throw new IllegalStateException("Failed to parse configurations from Config Center.", e);
            }
            return dynamicConfiguration;
        }
        return null;
    }
    /**
     * Add an instance of {@link EventListener}
     *
     * @param listener {@link EventListener}
     * @return {@link DubboBootstrap}
     */
    public DubboBootstrap addEventListener(EventListener<?> listener) {
        eventDispatcher.addEventListener(listener);
        return this;
    }
    /**
     * export {@link MetadataService}
     */
    private void exportMetadataService() {
        metadataServiceExporter.export();
    }
    private void unexportMetadataService() {