Always create service account even rbac_enabled = false

roles/kubernetes-apps/efk/fluentd/templates/fluentd-ds.yml.j2

@@ -28,9 +28,7 @@ spec:
         scheduler.alpha.kubernetes.io/critical-pod: ''
     spec:
       priorityClassName: system-node-critical
-{% if rbac_enabled %}
       serviceAccountName: efk
-{% endif %}
       containers:
       - name: fluentd-es
         image: "{{ fluentd_image_repo }}:{{ fluentd_image_tag }}"