Los Angeles • Ever since Bram Stoker’s Dracula began haunting the imagination in 1897, popular culture has identified Christian symbols — crucifixes, holy water, communion wafers — as weapons to ward off a blood-thirsty vampire. The Twilight novels and film franchise have religious associations, too — most of them from The Church of Jesus Christ of Latter-day Saints. As the film’s “Twi-hard” fans get ready for the third “Twilight” installment, “Eclipse,” to open in theaters Wednesday, few are likely to recognize the religious references in the film based on the novels by Stephenie Meyer, herself a Mormon. “People make up...