Comment 2 for bug 1460369

I can force the auth plugin to use with --os-auth-type but all the plugins still register their own options into the argparser. This means when the v2password comes along and it expected to find the options.tenant_id parameter it's actually been saved as options.project_id. There are also scope assertions that only work for the v3 or generic plugins that prevent the v2password from being allowed to load.

Hopefully the review (which for some reason wasn't linked [1]) will make the problems clearer.

[1] https://review.openstack.org/#/c/187033/