Use python3 for Leap 15 devstack jobs
Use python3 for Leap 15 devstack jobs

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