fix: use new style auth with icinga dispatch

roles/monitoring-master/tasks/icinga.yaml

@@ -124,6 +124,7 @@
     - 'const signal_gateway_host = "{{ event_dispatcher_host }}"'
     - 'const signal_gateway_port = "{{ event_dispatcher_port }}"'
     - 'const signal_gateway_proto = "{{ event_dispatcher_proto }}"'
+    - 'const dispatch_access_token = "{{ event_dispatcher_pass }}"'
   notify: restart icinga
 
 - name: Signal command loaded from monitoring tools