Remove old PTF repo during the upgrade so the new one can be added to zypp.
Remove old PTF repo during the upgrade so the new one can be added to zypp.

If there's a need to have PTF repo for both original and upgraded cloud,
we have to make sure that the old one is removed when changing the repository
setup.

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