Allow logins on JupyterHub 5.0

We are using pam auth, so it is ok that everyone with local account can login.
See https://jupyterhub.readthedocs.io/en/latest/howto/upgrading-v5.html#authenticator-allow-all-and-allow-existing-users

roles/grdc/tasks/main.yml

@@ -37,9 +37,6 @@
   loop: '{{ grdc_station_zips }}'
 - name: archycos
   include_tasks: archycos.yml
-- name: GTN-R
-  include_tasks: gtnr.yml
-  loop: '{{ grdc_gtnr }}'
 - name: researchdrive archives
   include_tasks: researchdrive.yml
   loop: '{{ grdc_researchdrive_archives }}'

roles/jupyter/templates/jupyterhub_config.py.j2

@@ -45,3 +45,5 @@ c.JupyterHub.cleanup_proxy = False
 c.JupyterHub.base_url = '/jupyter'
 
 c.JupyterHub.template_vars = {'announcement_login': 'By logging in you accept the GRDC observation data policy at https://www.bafg.de/GRDC/EN/01_GRDC/12_plcy/data_policy_node.html'}
+
+c.Authenticator.allow_all = True