dmwm/WMCore — pull request #5433 by amaltaro (2014-10-27 20:56:17+00:00)
Title: protects when condor returns undefined; properly rollback transaction

Replaces #5296 PR in a not so intrusive way.
- JobStatusLite won't crash when (py)condor plugin returns 'undefined'
- Properly rollback the transaction

@ticoann please review