allow commented (disabled) cronjob (#230)

linux/system/job.sls

@@ -16,6 +16,9 @@ linux_job_{{ job.command }}:
       {%- if job.get('identifier', True) %}
     - identifier: {{ job.get('identifier', job.get('name', name)) }}
       {%- endif %}
+      {%- if job.get('commented', False) %}
+    - commented: True
+      {%- endif %}
     - user: {{ job_user }}
       {%- if job.special is defined %}
     - special: '{{ job.special }}'