It’s off to the races for a bankruptcy trustee, who got the go-ahead to seek $20 million he alleges was misappropriated by the directors of two defunct horse-racing tracks.In a written opinion last week, U.S. District Judge John J. Tharp Jr. denied a motion to dismiss eight of the nine counts in a lawsuit filed by Barry A. Chatz of Saul Ewing Arnstein & Lehr LLP.Chatz is the trustee of the Balmoral Racing Club Inc. …