Used by a new featureset that uses the neutron ansible-networking driver
to configure the switch providing networking for overcloud ironic
nodes such that tenant networks are segregated via vlan.
This scenario also sets up ssh keys so that ansible inside the neutron
container can ssh to the controller to configure OVS.
The new scenario also includes a temporary workaround to upgrade
ansible in the neutron container, this can be removed once ansible
in the container is v2.5.8+
Also remove scenario011 as the patches that used it never merged and
now the tennant networks are working in the overcloud, we'll test
with this instead.
 - https://review.openstack.org/#/c/579601/