JACKSON, Miss. (WLBT) – A former Jackson mayor, a former councilman and the sitting Hinds County district attorney have all kept their not guilty pleas in a federal bribery case as a major deadline approaches. Former Jackson Mayor Chokwe Antar Lumumba, former Councilman Aaron Banks and Hinds County District Attorney Jody Owens are charged in connection with a scheme to bring a convention center hotel to Jackson. The deadline for changing their p…