rails 4 fix ActionDispatch::BestStandardsSupport

kmandrup:rails-api (master) $ rake test
Run options:

# Running tests:

Finished tests in 4.186601s, 4.7771 tests/s, 32.0069 assertions/s.
20 tests, 134 assertions, 0 failures, 0 errors, 0 skips

ruby -v: ruby 2.0.0p0 (2013-02-24 revision 39474) [x86_64-darwin12.2.0]