title: Paper trail controller as meta data does not work. (Ruby 2.3.3, Rails 4.2 and paper_trail 5.2.3)
body: <p>Following the steps to capture information from the controller as meta data does not work. (Ruby 2.3.3, Rails 4.2 and paper_trail 5.2.3)</p>
  
  <h1>model</h1>
  
  <pre><code>has_paper_trail only: [:status]
  </code></pre>
  
  <h1>migrate</h1>
  
  <pre><code>class AddHotelToVersions &lt; ActiveRecord::Migration
      def change
          add_reference :versions, :hotel, index: true, foreign_key: true, null: false
          add_column :versions, :ip, :string, null: false
          add_column :versions, :user_agent, :string, null: false
      end
  end
  </code></pre>
  
  <h1>controller</h1>
  
  <pre><code>def info_for_paper_trail
      { hotel_id: current_user.hotel.id, ip: request.remote_ip, user_agent: request.user_agent }
  end
  </code></pre>