This wasn’t the J.A. Happ the Yankees were used to seeing

Aaron Boone was asked to describe his comfort level when J.A. Happ toes the rubber. “It’s one of those days you look forward to,” the first-year manager said before Thursday night’s series opener against the Tigers. Or, at least, it had been until he jinxed his left-hander. Happ’s string of strong outings since coming over…