Add oidc plugin for listing federation projects
Add oidc plugin for listing federation projects

the oidc plugin should be included in the list of valid federation
protocols that can leverage `federation project list`

Change-Id: I3f5c5ab262c7097273716a81618a2dcbb159dd6f

openstack/python-openstackclient,BjoernT/python-openstackclient,BjoernT/python-openstackclient,redhat-openstack/python-openstackclient,redhat-openstack/python-openstackclient,dtroyer/python-openstackclient,openstack/python-openstackclient,dtroyer/python-openstackclient