mkcloud: Use ip command in cleanup function
mkcloud: Use ip command in cleanup function

Unify the network link handling and use always ip in the cleanup
function. This fixes some stupid error messages from ifup/ifdown
scripts if NetworkManager is used.

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