Chesapeake Energy Corp. and the estate of its former chief executive, the late Aubrey McClendon, have agreed to settle a legal dispute involving claims that Mr. McClendon stole sensitive documents from Chesapeake to start a rival company. The Oklahoma City-based company was seeking $445 million in damages from Mr. McClendon’s estate for the alleged theft of maps and data. The company said Mr. McClendon took that information with him…