WASHINGTON — Walter Leonard, an attorney and university administrator who designed an admissions process at Harvard University that led to more minority students being admitted, has died. He was 86.Leonard died Dec. 8 in Kensington, Md., of complications from Alzheimer’s disease, said his wife, Betty Leonard. The couple lived in Chevy Chase, Md..In 1971, Leonard was named as a special assistant to Harvard president Derek Bok. Leonard had already worked as an assistant dean and assistant director of admissions …