In cases when SSH and mgmt networks are different, it might be important
to have valid management_address that services are relying on when
listening on interfaces. At the moment for bare metal hosts
management_address will be equal to ansible_host which leads to
unpredictable behaviour under some scenarios. With management_ip we allow
to define another IP address that will be used as container/management
address for bare metal host, while `ip` will still represent
ansible_host.
Related-Bug: #2002645
Change-Id: I3152ae7985319e85b9ea520021f9eea6f5850341