Finalizing move to Symfony

* Fix an autoloader problem where we were requiring symfony classes
  before the configuration was loaded and the include paths registered

  The longer term fix will be to allow the configuration to be loaded
  with 'views' and for the view to be progressively modified as we
  determine what should be in the view (this will also help with accounts.)

* Fix leftover SymfonyRequest/SmashPigRequest confusion. We still had some
  old class names around which were throwing errors. Everything should now
  use the smashpig wrapper classes around the symfony ones.

Change-Id: Ia4d4159d012ecc12871a36ee99b02becc0a33ccd