track-upstream: Fix Master and add Stein
track-upstream: Fix Master and add Stein

- Cloud:OpenStack:Master no longer has SLE_12_SP4 so use SLE_15
- Add Cloud:OpenStack:Stein

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