container: fix ansible check mode when image not present on host

roles/container/tasks/main.yml

@@ -61,7 +61,7 @@
 - name: "Container for {{ docker_service_name }}"
   docker_container:
     name: "{{ docker_service_name }}"
-    image: "{{ container_image.Id }}"
+    image: "{{ container_image.Id if container_image != '' else docker_image }}"
     user: "{{ docker_user if docker_host_user else omit }}"
     mounts: "{{ docker_volume_definition }}"
     published_ports: "{{ container_published_ports + docker_published_ports }}"