modify the movies_controller_rspec.rb file. next step: DRY the common code
	modified:   spec/controllers/movies_controller_spec.rb
	new file:   spec/factories/movie.rb
	new file:   spec/fixtures/movies.yml
	new file:   spec/models/movie_spec.rb
update the movie_spec.rb in spec document to use factory girl
for views: use partial; for models: use validation; for controller: use safe version for update and create method