devstack: Adapt to lib/neutron
devstack: Adapt to lib/neutron

Depends-On: Icfa2cfa662013324d38099b82ce0f58ed8377e60
Change-Id: Iab72c3bde4d3ff1a9323e30bb4236d2770726068

openstack/neutron-vpnaas,openstack/neutron-vpnaas