- [ ] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate.
- [ ] I have checked the [FAQ](https://github.com/apache/dubbo/blob/master/FAQ.md) of this repository and believe that this is not a duplicate.

### Environment

* Dubbo version: 2.7.5
* Zookeeper version: 3.4.14
* Operating System version: macos
* Java version: 1.8

### Steps to reproduce this issue

1. 按官方文档搭建provider，两种方式：annotation/xml
2. 分别配置

```xml
    <dubbo:metadata-report address="zookeeper://127.0.0.1:2181"/>
```

```java
        @Bean
        public MetadataReportConfig metadataReportConfig() {
            MetadataReportConfig metadataReportConfig = new MetadataReportConfig();
            metadataReportConfig.setAddress("zookeeper://127.0.0.1:2181");
            return metadataReportConfig;
        }
```

3. 应用正常启动
4. Consumer端正常调用
4. 观察Zookeeper节点数据，元数据节点/dubbo/metadata 未创建

### Expected Result
元数据正常上报

### Actual Result

元数据节点在Zookeeper上未创建，元数据未上报

> 将dubbo版本号更改为2.7.4.1、2.7.3，代码或配置未改动，元数据正常上报

import org.apache.dubbo.common.bytecode.Wrapper;
import org.apache.dubbo.common.extension.ExtensionLoader;
import org.apache.dubbo.common.logger.Logger;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.apache.dubbo.common.utils.ClassUtils;
import org.apache.dubbo.common.utils.CollectionUtils;
import org.apache.dubbo.common.utils.ConfigUtils;
import org.apache.dubbo.common.utils.NamedThreadFactory;
import org.apache.dubbo.common.utils.StringUtils;
import org.apache.dubbo.config.annotation.Service;
import org.apache.dubbo.config.bootstrap.DubboBootstrap;
import org.apache.dubbo.config.event.ServiceConfigExportedEvent;
import org.apache.dubbo.config.event.ServiceConfigUnexportedEvent;
import org.apache.dubbo.config.invoker.DelegateProviderMetaDataInvoker;
import org.apache.dubbo.config.support.Parameter;
import org.apache.dubbo.config.utils.ConfigValidationUtils;
import org.apache.dubbo.event.Event;
import org.apache.dubbo.event.EventDispatcher;
import org.apache.dubbo.metadata.WritableMetadataService;
import org.apache.dubbo.rpc.Exporter;
import org.apache.dubbo.rpc.Invoker;
import org.apache.dubbo.rpc.Protocol;
import org.apache.dubbo.rpc.ProxyFactory;
import org.apache.dubbo.rpc.cluster.ConfiguratorFactory;
import org.apache.dubbo.rpc.model.ApplicationModel;
import org.apache.dubbo.rpc.model.ServiceDescriptor;
import org.apache.dubbo.rpc.model.ServiceRepository;
import org.apache.dubbo.rpc.service.GenericService;
import org.apache.dubbo.rpc.support.ProtocolUtils;
import java.lang.reflect.Method;