Comment 0 for bug 1481729

Glanceclient depends on having a running cloud/glance to do anything useful, even providing help. This is not only unfortunate from a user perspective but also an issue for `openstack-doc-tools` since they need to generate docs[0].

Lets make sure we don't depend on the schemas being around to generate the docs.

[0] https://review.openstack.org/#/c/195473/3