DETROIT — The Pistons are adding another veteran to their core of young pieces ahead of the start of training camp. Detroit has agreed to trade big man Kelly Olynyk and guard Saben Lee to the Utah Jazz in exchange for Bojan Bogdanovic, a league source confirmed to The Detroit News on Thursday. Shams Charania and James Edwards III of The Athletic were first to report the deal. By trading two players to the Jazz, the Pistons open an additional roster spot and acquire the flexibility to sign or acquire another player in the future. Bogdanovic, 33, is a 6-foot-7 forward who is scheduled to make $1…