mkcloud: fix NAT of public net
mkcloud: fix NAT of public net

this was NATed before as part of the enlarged admin net

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