A banker who took time off under the Family and Medical Leave Act acted too hastily when he quit his job 10 days after returning to work, a federal judge found.In a written opinion last week, U.S. District Judge Sara L. Ellis granted summary judgment in favor of JP Morgan Chase Bank N.A. in a lawsuit filed under the FMLA by Sergio Xula.Ellis acknowledged the disputed evidence in the case raises questions about whether Chase violated the act.Xula alleges Chase failed to assign him to a position that was equivalent to the …