entertainmentQ&A: Dermot and Kieran Mulroney honoring country/roots rock dreams with JackrabbitVideo

Dermot and Kieran Mulroney might be most notable for their movie/TV careers — Dermot for roles in “My Best Friend’s Wedding” and more recently “Chicago Fire” and “The Hunting Wives,” and Kieran for “Gettysburg” and as writer of “Sherlock Holmes: A Game of Shadows.” Yet the brothers could barely tamp