MODULES-1309 - Make package and service names configurable

This was motivated by a need to make this work on Debian Jessie.
need an additional and similiar test case for: 

```
context 'jessie/sid'
let(:facts) {{
    :operatingsystemrelease => 'jessie/testing',
    etc., . . . 
}}
```

Also, not seeing this in complete context, but would it make sense to also test this for `enable => true` as well?