Add prefix to virtual cluster containers
This may allow later to have one virtual cluster for CI-testing purposes only that has a different container / node naming
[A venir] Mise en place de quotas sur nos instances gitlab. Pour plus d'information lire: https://doc-si.inria.fr/pages/viewpage.action?pageId=129728565
This may allow later to have one virtual cluster for CI-testing purposes only that has a different container / node naming