bugfix: service creation with portal is broken

- Filebeat autodiscover condition isn't working for all
  hosts. Switched condition to docker_enabled flag. If a
  container has no default log file (harbor) there isn't
  a problem because there will just no log file found.
  The autodiscover docker container log files mustn't
  deactivated in this cases at all.

templates/filebeat/config/filebeat.yml.j2

@@ -38,7 +38,7 @@ filebeat.inputs:
   {% endif %}
 {% endfor %}
 {% endif %}
-{% if ansible_fqdn not in groups['harbor'] %}
+{% if docker_enabled | default(true) %}
 
 filebeat.autodiscover:
   providers: