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

### Steps to reproduce this issue

1. provider 开启认证 `dubbo.provider.token=true`
2. 调用异常
```
org.apache.dubbo.rpc.RpcException: Invalid token! Forbid invoke remote service interface org.test.apache.dubbo.interfaces.PeopleService method work() from consumer 192.168.1.3 to provider 192.168.1.3, consumer incorrect token is 54ff0e8d-e486-4986-823d-f028302d5fbb
```
### 原因
consumer 在获取token的时候，先获取 Instance 的 token ，如果没有再获取 interface 的 token.
`实例 token`
![image](https://user-images.githubusercontent.com/43994656/127740178-31ac570a-ce98-4fc9-9e27-d87236fd86da.png)
`接口 token`
![image](https://user-images.githubusercontent.com/43994656/127740200-d2cc7833-5092-4043-936a-3fcb3b07d046.png)
`最终获取的 token 是实例的 token`
![image](https://user-images.githubusercontent.com/43994656/127740240-4c4ba965-1e2b-4282-b717-67afaa9a8b93.png)

https://github.com/apache/dubbo/blob/6c8046aa43771ced3d725af4fb8e7455166fe9ea/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/client/InstanceAddressURL.java#L142-L148

if (obj == null) {
            return false;
        }
        if (!(obj instanceof InstanceAddressURL)) {
            return false;
        }
        InstanceAddressURL that = (InstanceAddressURL) obj;
        return this.getInstance().equals(that.getInstance());
    }
    @Override
    public int hashCode() {
        return getInstance().hashCode();
    }
    @Override
    public String toString() {
        if (instance == null) {
            return "{}";
        }
        if (metadataInfo == null) {
            return instance.toString();
        }
        String protocolServiceKey = RpcContext.getServiceContext().getProtocolServiceKey();
        if (StringUtils.isNotEmpty(protocolServiceKey)) {
            return instance.toString() + ", " + metadataInfo.getServiceString(protocolServiceKey);
        }
        return instance.toString();
    }
}