mkcloud: fix caching of repositories for Crowbar8+ again
mkcloud: fix caching of repositories for Crowbar8+ again

With the rename of the product to Crowbar-8 the caching got broken,
as it cached the ardana repositories. Adjust to use the proper
variable name which takes care of that oddity.

aspiers/automation,gosipyan/automation,gosipyan/automation,SUSE-Cloud/automation,gosipyan/automation,SUSE-Cloud/automation,aspiers/automation,aspiers/automation,gosipyan/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,aspiers/automation