title: skip_before_action and Rails 5
body: <p>I just upgraded to Rails 5 and everything went pretty smoothy but for no apparent reason a method that is called after <code>skip_before_action</code> is not allowing rspec to run with this message</p>
  
  <blockquote>
    <p>Before process_action callback :redirect_heroku_user has not been defined (ArgumentError)</p>
  </blockquote>
  
  <p>It is super strange because it works just fine on rails 4. Here is my code:</p>
  
  <pre><code># application_controller.rb
  def redirect_heroku_user
    redirect_to root_path if heroku_user?
  end 
  
  # some_controller.rb
  skip_before_action :redirect_heroku_user, only: :edit
  </code></pre>