By Mimosa Spencer PARIS (Reuters) -LVMH veteran executive Michael Burke has been appointed chairman and chief executive of LVMH Fashion Group, overseeing all of the luxury goods group’s fashion labels, it said on Thursday. Burke – chairman and CEO Bernard Arnault’s longest serving lieutenant – replaces long-time Fashion Group head Sidney Toledano, who was named advisor to Arnault and will exit the company’s executive committee. Burke, 66, was CEO of LVMH’s biggest label Louis Vuitton until a year ago, headed labels Fendi and Bulgari and served as chairman of the board of Tiffany, LVMH’s larges…