Add networking-fujitsu ML2 driver to multitenacy doc
Add networking-fujitsu ML2 driver to multitenacy doc

This pathcs adds networking-fujitsu ML2 driver to the list of ML2
drivers which support network multi-tenacy.

Change-Id: I202f668ebe9ee917f875aca50284a35c5024b60f

openstack/ironic,openstack/ironic