(Reuters) – Scottish singer Susan Boyle will get her first turn on the big screen in the British holiday period film "The Christmas Candle," the movie's producers said on Thursday. Boyle, 51, will back up Samantha Barks, Hans Matheson and Lesley Manville in the Christmas film that began production this week on location in the United Kingdom and the Isle of Man. The film, based on the novella by Max Lucado, tells the tale of an enchanted Christmas candle in Gladbury, a dull village that must confront the dawning of the 20th century and a new, skeptical minister. …