The Oakland Tribune plans to vacate the storied Tribune Tower in downtown Oakland in the coming months, three knowledgeable sources said today. The move is part of a sweeping consolidation plan brought about by the MediaNews — the Trib’s parent company – purchase of the Contra Costa Times and the San Jose Mercury News. MediaNews plans to move all business and most advertising staff from its East Bay and South Bay papers to a building it will lease at Bishop Ranch Business Park in San Ramon. According to one well-placed source, Tribune editorial staff, including all reporters, photographers, and editors...