[constellation] Front web can be disabled

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>

group_vars/constellation.yml

@@ -20,6 +20,7 @@ glob_constellation:
     user: 'constellation'
     password: "{{ vault.constellation_django_db_password }}"
     name: 'constellation'
+  front: True
   applications:
     - 'access'
     - 'billing'

roles/constellation/templates/constellation/settings_local.py.j2

@@ -20,6 +20,9 @@ LOCAL_APPS = [
 {% endfor %}
 ]
 
+# Activate this option if a web front is needed
+USE_FRONT = {{ constellation.front }}
+
 # The time zone the server is runned in
 TIME_ZONE = 'Europe/Paris'