Comment 6 for bug 1457100

As previously mentioned, I can cause this bug to happen with a auth plugin that actually does nothing:

https://gist.github.com/sivel/4eab70746b747affa9b3

In fact, if I comment out the line using setuptools.find_packages in setup.py and install no python file at all, the entry point will still cause this error to happen. Such as installing using a setup.py that looks like:

https://gist.github.com/sivel/cb98f8d98849a030e970

As long as you have an entrypoint for openstack.client.auth_plugin or novaclient.extension it will cause this error as soon as ep.load() is called.