Fix networking-ovn openstack-tox-cover job
Add openstack/neutron to the project-requirements as per the error
message generated by the test run.
- ^tox.ini$
- ^vagrant/.*$
- openstack-tox-cover:
+ required-projects:
+ - openstack/neutron
voting: false
- legacy-tempest-dsvm-networking-ovn-neutron-api-ovs-release:
voting: false
