By Denny Dyroff, Staff Writer, The Times Les Misérables It’s hard to take farewell tours seriously. Music acts such as the Who, Frank Sinatra, Cher and David Bowie have all, at one time or another in their careers, embarked on a “Farewell Tour.” No-one really believed them and, eventually, the artists were back on stage performing again. The hit musical “Les Misérables” went out on its...