Grass Valley City Manager Dan Holler is looking for a new job.Holler is among five finalists who will be interviewed on Aug. 16 during a special meeting of the Churchill County Commission in western Nevada. He has been Grass Valley's top staffer since 2008, guiding the city through some of the most difficult economic times in decades.City Council members learned of his application to Churchill County late Thursday when he sent them an emall, said Mayor Janet Arbuckle. Holler is on vacation and could not be reached for comment."I was very surprised to find out that he was in that …