Raise memory for s390x runs
Raise memory for s390x runs

This is a terrible workaround for the lack of proper mkcloud support
on s390x

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