修复consul限流gateway问题

consul/consul.go

@@ -251,7 +251,7 @@ func GetInstanceAddr(ctx context.Context, name string) (addr string, err error)
 		err = errors.New("获取服务监听器失败")
 		return
 	}
-
+	defer watch.Close()
 	service, err := watch.Proceed()
 	if err != nil || service == nil {
 		err = errors.New("获取服务实例失败")