crowbar-prep.sh: rename misleading sc2_repo variable
crowbar-prep.sh: rename misleading sc2_repo variable

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