Moving to v3 requires etcd3, which uses a new L4 gatewayvsetup and
deprecates v2 proxy. The role configuration is updated to use the
etcd3 L4 gateway.
Change-Id: I91d3fef8d1b89f595b529c7c96b3d7249e5b7291
Integrate deployment for Project Calico's Neutron networking
plugin into the os_neutron role.
See http://docs.openstack.org/developer/networking-calico/
for more information about Calico.
Change-Id: I80546b6deefe0878398716d173b7dcc36c3bef3a