Add tests for new config options

cef209499ac5361bffc31dafb788f9f53d09eb50 didn't include any tests!
Use description, not described class

The described class is overridden by rspec-rails's controller block,
which creates an anonymous controller. See:
<https://www.relishapp.com/rspec/rspec-rails/docs/controller-specs/anonymous-controller>
Merge pull request #13 from rightscale/charcoal_14_07_anonymous_controller_acu158421

Charcoal 14 07 anonymous controller acu158421