Don't fall when just loading ironicv1 modules

this avoids loading warnings on salt-master that may not have
os-client-config installed, as salt tries to load them irrespective of
__virtual__() result.

Change-Id: Ie38b80cb604380a63627b020e49a6a016fcbe8b7
Related-Issue: https://mirantis.jira.com/browse/PROD-26920
1 file changed