Nearly seven months ago, St. Louis Mayor Francis Slay unceremoniously fired the city's excise commissioner, Bob Kraiberg, who for three decades had been charged with supervising the liquor licensing process at City Hall.Since that time, Kraiberg has been making his case to the city's Civil Service Commission, fighting to get his job back. At a hearing in June, he argued that he was protected by civil service rules, which are designed to shield city employees from the whims of politics.…