Comment 2 for bug 1717485

Note that only an admin can make and image public already - this is part of the default glance policy:

    "add_image": "",
    "delete_image": "",
    "get_image": "",
    "get_images": "",
    "modify_image": "",
    "publicize_image": "role:admin",
    "communitize_image": "",
    "copy_from": "",

a regular user can 'communitize_image' which is a bit different.