We need to make tox job failing when buildsys-tag tag does not match with the buildsys-tags file name.

Exemple:

 # in buildsys-tags/cloud8s-openstack-yoga-testing.yml
- project: python-ssh-python
    cloud9s-openstack-yoga-candidate: python-ssh-python-0.9.0-1.el8

where cloud9s-openstack-yoga-candidate should be cloud8s-openstack-yoga-candidate

This should avoid us to mis-tag a package as it happened in the past.