Confirmed on master.
$ glance --os-image-api-version 2 image-update 6b0fab13-503f-46fb-b04e-be750afc51f9 --owner alice <html> <head> <title>403 Forbidden</title> </head> <body> <h1>403 Forbidden</h1> Attribute 'owner' is reserved.<br /><br />
</body> </html> (HTTP 403)
Confirmed on master.
$ glance --os-image- api-version 2 image-update 6b0fab13- 503f-46fb- b04e-be750afc51 f9 --owner alice
<html>
<head>
<title>403 Forbidden</title>
</head>
<body>
<h1>403 Forbidden</h1>
Attribute 'owner' is reserved.<br /><br />
</body>
</html> (HTTP 403)