MONTGOMERY, Ala. — After the governor began raiding the state's electronic bingo halls, casino owners sent lobbyists to the Capitol with orders to make their Vegas-style parlors legal. Part of the plan, federal authorities said Monday, was to offer lawmakers millions of dollars in bribes.The Justice Department unveiled an indictment accusing the owners of two of Alabama's largest casinos, four state senators and several lobbyists of a scheme to buy and sell votes in the Legislature.