Test against a different list of generated files for Rails 3 and 4

Bring tests back to green in 3.2.
Remove BestStandardsSupport from rails 4 stack since it was removed here:
https://github.com/rails/rails/commit/3bccd12373567bf9369f44522599b7d61a006f60
Merge pull request #66 from et/remove_best_standards_support

Remove BestStandardsSupport from rails 4 stack since it was removed