Fix per service option parsing.

* None is being passed as a string. Replace with explicit ''
* Fix typo with autorestart preventing its use
Should still be the case:

![screen shot 2014-12-17 at 13 30 05](https://cloud.githubusercontent.com/assets/34150/5471729/d8c52d50-85f0-11e4-9855-24af9666e1b5.png)

(generated using https://github.com/abourguignon/jinja2-live-parser)

Is salt really mangling the jinja that badly? :(