Comment 1 for bug 1803451

This should be glance-common not cinder:

https://github.com/openstack/charm-glance/blob/master/hooks/glance_utils.py#L276

I have incorporated a fix into https://review.openstack.org/#/c/596921/

It will be worth testing with this. The fix can be changed independently if the registry deprecation bits do not behave well.