Nobrainer, ORM for RethinkDB, support

The tests for the nobrainer.gemfile fails on Travis due to active_support not being loaded by the ORM, I think. 

Wasn't sure how to add this in with out dirtying up the tests anymore than I already have.
Sorry, I was just trying to stick to the way the gem currently tested for ORMs. Could you point me in the direction to doing this better? `defined?(NoBrainer)`?