[mailman3] Disable sending e-mails on staging

This commit is setting both mailman and hyperkitty to devmode and doesn't allow
them to sent mails anywhere.

I tested that from web UI and using `mail` command on the machine.

Signed-off-by: Michal Konecny <mkonecny@redhat.com>

inventory/group_vars/mailman_stg

@@ -74,3 +74,8 @@ mailman_hyperkitty_cookie_key: "{{ mailman_hk_cookie_key }}"
 mailman_hyperkitty_archiver_key: "{{ mailman_hk_stg_archiver_key }}"
 mailman_openidc_server_url: "https://id.stg.fedoraproject.org/"
 mailman_httpd_hostname: lists.stg.fedoraproject.org
+
+# Setting debug variables to 'true' disables mail sending
+# If you want to enable it just set it to 'false'
+mailman_debug: true
+mailman_hyperkitty_debug: true

roles/mailman3/defaults/main.yml

@@ -18,6 +18,7 @@ mailman_log_items:
   - subscribe
   - task
 mailman_smtp_port: 25
+mailman_debug: false
 
 # Mailman DB settings (the values should be provided by playbook)
 mailman_db_server: localhost

roles/mailman3/templates/mailman.cfg.j2

@@ -16,6 +16,12 @@ listinfo_url = /admin/
 # Set the paths to be Fedora-compliant
 layout: fhs
 
+{% if mailman_debug %}
+[devmode]
+enabled: yes
+recipient: ""
+{% endif %}
+
 [paths.fhs]
 bin_dir: /usr/libexec/mailman3
 var_dir: /var/lib/mailman3