Allow RPM vendor changes during upgrade
Allow RPM vendor changes during upgrade

This allows testing GM3 -> develcloud4 upgrades and should fix the currently
failing jenkins job for that.

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