Fix tests under Rails 4.2.0.beta1 - Failing in travis with this: deprecated_sanitizer/version.rb:1:in `<top (required)>': Rails is not a module (TypeError) (https://travis-ci.org/collectiveidea/delayed_job/jobs/33634692)
Merge pull request #689 from johnnaegle/feature/fix-rails-4.2-tests

Address tests failures under Rails 4.2.0.beta1 -