run actionpack tests for rails patch

http://dev.rubyonrails.org/ticket/10733

Got tired of running all rake tests to try a patch, so I just need to run a few files.

/code/rails/actionpack travis$ /opt/local/bin/ruby -Ilib:test "/opt/local/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake/rake_test_loader.rb" "test/controller/caching_test.rb" "test/controller/new_render_test.rb" "test/controller/rescue_test.rb"