nova/api: include ::nova::network::neutron
nova/api: include ::nova::network::neutron

It was included in THT before, but it's now in nova/api role.
It will also be added in nova/compute role later.

Change-Id: I6b5857d3d4740c0bf3f748719f30a05f1c62cb59

openstack/puppet-tripleo,openstack/puppet-tripleo,openstack/puppet-tripleo