Merge "Fix return value of "image set" command"

Author: Jenkins

openstackclient/image/v1/image.py

@@ -691,7 +691,7 @@ def take_action(self, parsed_args):
 
             if not kwargs:
                 self.log.warning('no arguments specified')
-                return {}, {}
+                return
 
             image = image_client.images.update(image.id, **kwargs)
         finally: