SALT LAKE CITY — A lawsuit against the Utah Jazz by a fan who was banned for life from the team’s arena over what were called racial taunts directed at point guard Russell Westbrook was dismissed by a judge, according to court documents filed Thursday.Shane Keisel has said there was nothing racial about his heckling during the 2019 game and that the high-profile incident cost him his job and exposed him to online threats. The Jazz, however, said the team investigated the episode that ignited a national conversation about …