The Roman Catholic Diocese of Springfield has agreed to a $60 million settlement with its insurer for damage done to a parochial high school and other church property by a tornado two years ago. The resolution with insurer Catholic Mutual Group announced Tuesday settles a dispute that was sometimes contentious over how much money it would take to rebuild Cathedral High School. The diocese and the insurer were tens of millions of dollars apart in their estimates. The June 1, 2011, tornado made the building that housed the high school and St. Michael’s Academy middle school unsafe. The insurer has paid nearly $20 million and will make another payment of $40 million.