In the past year, I have seen the remarkable Chicago actress Janet Ulrich Brooks in two distinctive TimeLine Theatre productions, each performance as different from the other as night and day.Last year in “The Audience,” Brooks portrayed Queen Elizabeth II in a gracious, courteous and genteel manner. Now in “Master Class,” Terrence McNally’s, exquisitely written, Tony Award-winning play, Brooks explodes across the Stage 773 stage as the formidable opera diva Maria Callas, displaying a most …