By Holmes Lybrand, Evan Perez, CNN (CNN) — A memorial service Thursday for William Webster, former FBI and CIA director, served as something of a wake for an era that seems ever more distant in the age of Donald Trump. He was eulogized by former FBI Director Christopher Wray as exemplifying “what it meant to be a servant leader,” having served in the US Navy during the Korean War, then later as a judge, before becoming FBI and CIA director appoi…