mkcloud-onhost: cleanup iptables scripting
mkcloud-onhost: cleanup iptables scripting

reduce code duplication

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