Usage of not existing controller

[tflori]

Both controllers (CodeGreenCreative\SamlIdp\Http\Controllers\LogoutController and CodeGreenCreative\SamlIdp\Http\Controllers\MetadataController) are extending App\Http\Controllers\Controller. This class not necessarily exists. For example we renamed our namespace.

Instead the controllers should extend Illuminate\Routing\Controller as it is the basic controller.

Also I don't see a reason why they are extending this controller. Maybe there was a reason that I don't see...

[upwebdesign]

@tflori I've updated which controller (Illuminate) is used for both controllers in this package.