TULSA, Okla., May 18, 2015 /PRNewswire/ — Magellan Midstream Partners, L.P. (NYSE: MMP) announced today that Aaron Milford has been promoted to chief financial officer effective today. Milford previously served as vice president of crude oil business development for Magellan. Milford has worked in the energy industry for 20 years with extensive experience in financial analysis,…