Comment 7 for bug 1904612

I had a customer request for this feature. The vm networks that juju connect to doesn't have DHCP server, the customer's current pactice is to allocate the IP address from external DHCP server (infoblox) first, then pass it to the ansible playbook to provision the machine. Now they are interested in to integrate the ansible workflow with juju, but we need first ensure juju can support adding static IP to machine