我们使用方法分组来用dubbo，每个分组有自己权限，但是dubbo:registry标签 username & password 不生效，
让我不得不使用
```
    <dubbo:registry
            address="zookeeper://username:pwd@ip:port"
            group="xxx"/>
```
这种写法失效
```
    <dubbo:registry
            address="zookeeper://ip:port"
            username="username"
            password="pwd"/>
```

import org.apache.dubbo.common.utils.NetUtils;
import org.apache.dubbo.common.utils.ReflectUtils;
import org.apache.dubbo.common.utils.StringUtils;
import org.apache.dubbo.common.utils.UrlUtils;
import org.apache.dubbo.config.context.ConfigManager;
import org.apache.dubbo.config.support.Parameter;
import org.apache.dubbo.configcenter.DynamicConfiguration;
import org.apache.dubbo.configcenter.DynamicConfigurationFactory;
import org.apache.dubbo.metadata.integration.MetadataReportService;
import org.apache.dubbo.monitor.MonitorFactory;
import org.apache.dubbo.monitor.MonitorService;
import org.apache.dubbo.registry.RegistryService;
import org.apache.dubbo.rpc.Filter;
import org.apache.dubbo.rpc.InvokerListener;
import org.apache.dubbo.rpc.ProxyFactory;
import org.apache.dubbo.rpc.cluster.Cluster;
import org.apache.dubbo.rpc.model.ApplicationModel;
import org.apache.dubbo.rpc.support.MockInvoker;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import static org.apache.dubbo.common.config.ConfigurationUtils.parseProperties;
import static org.apache.dubbo.common.constants.CommonConstants.ANYHOST_VALUE;
import static org.apache.dubbo.common.constants.CommonConstants.CLUSTER_KEY;
import static org.apache.dubbo.common.constants.CommonConstants.COMMA_SEPARATOR;