Generators: respect model name if provided

Presenters should respect `--model-name` passed to `scaffold_controller`
generator or any other one supporting this option.

That could be of a particular use to solve namespace issues
(e.g., when controllers are namespaced and models are not).

See also drapergem/draper#919.

lib/generators/rails/presenter/presenter_generator.rb

@@ -3,6 +3,7 @@
 module Rails
 	class PresenterGenerator < Generators::NamedBase # :nodoc:
 		include Magic::Presenter::Generator
+		include Generators::ResourceHelpers
 
 		source_root File.expand_path('templates', __dir__)
 
@@ -19,7 +20,9 @@ def create_presenter_file
 			template 'presenter.rb', "#{file_path}.rb"
 		end
 
-		hook_for :test_framework
+		hook_for :test_framework do |generator|
+			invoke generator, [ name ]
+		end
 
 		private