This reverts commit a747ab5b.

This commit breaks all exception catching plugins like ExceptionNotifier. These plugins should be rewritten as middleware instead overriding Controller#rescue_action_in_public.

Functional test runner finalizes response just like the integration test runner. In both runners, the @response object will now behave the same.

Some functional tests will need to be updated if they are relying on preprocessed data on the response.

[#2595 state:committed]
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

Methods raising ActiveRecord::RecordNotFound were returning 404 on first request and 200 OK with blank body on subsequent requests.

[#2533 state:committed]
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

Deprecate template, session, assigns, and layout accessors on response object. Instead access them through the controller instance. This mainly affects functional test assertions.

  ActionView::Template is now completely independent from template
  storage, which allows different back ends such as the database.
  ActionView::Template's only responsibility is to take in the
  template source (passed in from ActionView::Path), compile it,
  and render it.