Rule 19 F.R.Civ.P. applies in adversary proceedings, except that (1) if an entity joined as a party raises the defense that the court lacks jurisdiction over the subject matter and the defense is sustained, the court shall dismiss such entity from the adversary proceedings and (2) if an entity joined as a party properly and timely raises the defense of improper venue, the court shall determine, as provided in 28 U.S.C. § 1412, whether that part of the proceeding involving the joined party shall be transferred to another district, or whether the entire adversary proceeding shall be transferred to another district.