Clear previous witness when adding new ones
requested to merge 192-references-to-previous-witnesses-are-not-updated-when-relaunching-abs2gal into master
[A venir] Mise en place de quotas sur nos instances GitLab. Plus d'information sur : https://doc-si.inria.fr/pages/viewpage.action?pageId=129728565
[Coming soon] Quotas installation on our GitLab instances. More information: https://doc-si.inria.fr/pages/viewpage.action?pageId=129728565