restructured playbooks, cleanup

roles/cobald/tasks/grafana.yml

@@ -14,11 +14,12 @@
 - name: run grafana
   docker_container:
     name: ed-grafana
-    image: grafana/grafana:7.5.7
+    image: docker.io/grafana/grafana:7.5.7
     hostname: ed-grafana
     domainname: cobald.local
     networks:
     - name: "{{cobald_docker_network}}"
+    networks_cli_compatible: True
     published_ports:
     - "3000:3000"
     state: started
@@ -42,7 +43,6 @@
       version: Flux
     additional_secure_json_data:
       token: "{{influx_grafana_token.token}}"
-  register: das
 
 - community.grafana.grafana_dashboard:
     grafana_url: http://localhost:3000