Fix:return error should be Response_OK

registry/zookeeper/listener.go

@@ -23,11 +23,14 @@ import (
 )
 
 import (
-	"github.com/dubbo/go-for-apache-dubbo/common/logger"
 	perrors "github.com/pkg/errors"
 	"github.com/samuel/go-zookeeper/zk"
 )
 
+import (
+	"github.com/dubbo/go-for-apache-dubbo/common/logger"
+)
+
 import (
 	"github.com/dubbo/go-for-apache-dubbo/common"
 	"github.com/dubbo/go-for-apache-dubbo/registry"