* Add support for multiple descriptions for controls
This adds the ability to specify multiple descriptions in controls.
Example:
```ruby
control 'my-control' do
impact 1.0
title 'My control'
desc 'A default description'
desc 'rational', 'I need an example'
describe file('/tmp') do
it { should be_directory }
end
end
```
Many thanks to @jquick for helping me with the unit tests.
* Remove unused `descriptions` method
* Remove unused profile from test mocks
* Respond to feedback
Signed-off-by: Jerry Aldrich <jerryaldrichiii@gmail.com>
