[firewall] Deploy firewall

plays/firewall.yml

+#!/usr/bin/env ansible-playbook
+---
+# Deploy firewall
+- hosts: crans_routeurs
+  vars:
+    re2o:
+      server: re2o.adm.crans.org
+      service_user: "{{ vault_re2o_service_user }}"
+      service_password: "{{ vault_re2o_service_password }}"
+  roles:
+    - firewall