Don't fall when just loading gnocchiv1 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: I7527cffa5295143815fe65bd87f3397e2fd114fa
Related-Issue: https://mirantis.jira.com/browse/PROD-26920
(cherry picked from commit 24394b3bc8354005f116d3130c8471c13ea676d8)
1 file changed