Scott McKibben, the former president and publisher of the Oakland Tribune who was involved in a failed attempt to buy the Oakland Athletics, was selected Friday as the new executive director of the authority that oversees O.co Coliseum and Oracle Arena. McKibben, a Pleasanton resident, also is CEO and commissioner of the A11 Football League, a professional spring league set to kick off in 2016, the former executive director of the Rose Bowl and former executive vice president and chief revenue officer…