Comment 0 for bug 1577821

The glance command line enables user to supply ID to the image
while creating the using the`glance image-create` command.

However, the backend imposes that the ID of an image be a UUID.

There no meaning of letting user supply ID as parameter, if the ID
needs to be a UUID.
User should be able to set custom ID for images as per need.

Also, the regular expression for the image ID is hard coded in the
backend. It will be nice if it is configurable in `schema-image.json`