Fix seed network setup.

I missed a setup-neutron call when adding bare metal metadata routes.
Also changed the order of parameters to neutron so SUBNET_EXTRA is last
and parsed correctly.

Co-Authored-By: Roman Podolyaka <rpodolyaka@mirantis.com>

Change-Id: Ic41cdd60a9cd4c94fb4d4cff7346a37ae4a85a65