PROVIDENCE — One cue that this wouldn't be the typical concert was its billing as “The John Mellencamp Show” and the note that it would start promptly at 8 p.m.The lights at the Providence Performing Arts Center dimmed at exactly that hour Friday night for a 15-minute biographical film about the 67-year-old Rock and Roll Hall of Famer featuring clips of interviews, American Bandstand and MTV appearances and his disembodied voice talking about an industry that made [...]