Clean up UIPopoverController+Spec a bit
Clean up UIPopoverController+Spec a bit

- mild DRY refactor
- remove unnecessary/untested -dealloc override

pivotal/PivotalCoreKit,idoru/PivotalCoreKit,joemasilotti/PivotalCoreKit,gudatcomputers/PivotalCoreKit,pivotaltracker/PivotalCoreKit,joemasilotti/PivotalCoreKit,gudatcomputers/PivotalCoreKit,jfuchs/PivotalCoreKit,briancroom/PivotalCoreKit,jfuchs/PivotalCoreKit,idoru/PivotalCoreKit,mjstallard/PivotalCoreKit