with_routing. This only affects our internal AP tests.

Get ActionPack's test running on bundled gems. This should make running tests on new machines, as well as CI, work well.

Activate rack-test gem before it's required. This shouldn't be necessary, but should fix the build for now

Cleanup route reloading in tests. Prefer with_routing over using ActionController::Routing::Routes directly

Replace _action_view with view_context to reflect that it is public and that it does not need to be an ActionView instance

  - Define to_model on AR
  - Define to_model on ActiveModel::APICompliant
  - Update test fixtures to be API Compliant
  - Start using to_model in AP

Got new base to pass controller/base_test.rb, implemented method_missing action semantics in compatibility mode, and fixed a few action_missing bugs.

Signed-off-by: NJoshua Peek <josh@joshpeek.com>