GOODLETTSVILLE, Tenn., 2015-12-4 — /EPR Retail News/ — Dollar General Corporation (NYSE:DG) today announced the promotion of John W. Garratt to executive vice president and chief financial officer (CFO), effective December 2, 2015. Garratt has served as Dollar General’s interim CFO since June 2015 and previously served as its senior vice president of finance and strategy since…