Legendary Pictures’ biopic “42” opens this Friday, timed to coincide with Major League Baseball’s Jackie Robinson Day, when the league commemorates Robinson’s major league debut and the end of the color line in baseball. The timing of the movie’s release is possibly the key thing to know about the movie, because “42” is an unashamed hero piece made to glorify an American hero. There is no attempt to reduce the scope to Jackie Robinson The Man, although we do get some insight into how he endured the abuse that came with being the first black player in the majors.