Changed org spec to use rspec2 expectations

Changed around to use expect method as rspec 2 prefers.  We still have to use should_receive for current versions of rspec but last month a release candidate was made for a line of 2.14 that supports a to_receive method like:

expect(car).to_receive(:ignition)

http://teaisaweso.me/blog/2013/05/27/rspecs-new-message-expectation-syntax/

So in the near future we may be able to move to this.