Star Staff Reports Playhouse 51 will have open auditions for its holiday musical, “The Littlest Light on the Christmas Tree,” Friday Sept. 22, 7-9 p.m. and Saturday Sept. 23, 10 a.m.-noon at Harvell Civic Center, 8077 Wilkinsville Road in Millington. Needed for the cast are 8 actors, male or female, of any age; a boy…