[g5k-postinstall] upgrade to NFSv4
- remove intr (deprecated and ignored since 2.6.25)
- remove rsize/wsize => autonegotiate between client/server
[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