changed naming on upstart script for supervisorctl behavior

Not sure if you guys are having the same issues that I am with pip instancing supervisor ...

details outlined here:
http://cuppster.com/2011/05/18/using-supervisor-with-upstart/

TLDR:
supervisorctl picks up /etc/init/supervisord.conf and attempts to use it as a supervisor configuration file **instead** of an init script.


<pre>
$ salt '*' state.highstate
...

----------
          ID: supervisor-service
    Function: service.running
        Name: supervisor
      Result: False
     Comment: One or more requisite failed
     Changes:  

...
</pre>
Ditto here:

```
graphite_supervisord_init:
  file.managed:
    - name: {{ graphite.supervisor_init }}
```