By Christopher Caggiano, Contributing Writer, April 16, 2018 Each year, when I cover Rodgers and Hammerstein's Carousel in my musical-theater history course at the Boston Conservatory, we have a lengthy discussion about what I call "The Elephant in the Room." Carousel barker Billy Bigelow hits his wife, Julie, and at numerous points throughout the show, Julie […] You may also be interested in: Review: R…