Kenya’s U.N. ambassador said Thursday that the Kenyan general who was in charge of peacekeepers in South Sudan during a violent episode in July has been made a ‘scapegoat’ for systemic U.N. peacekeeping failures.   Ambassador Macharia Kamau told reporters that an internal U.N. investigation into events during July 8-11, was conducted with a “preordained outcome in mind.”   “The investigation, we have come to conclude, is shameful, unfair and an exercise in scapegoating,” Kamau...