A $300,000 settlement has been reached in the federal suit of a former official who said the MTA fired him because he objected to a $65 million subway-construction contract that, he said, was linked to an MTA board member‘s kickback.Last month’s out-of-court settlement between Leroy H. Graw, the MTA and former top MTA executives was announced this week by Graw‘s attorney, Louis J. Cohen of Calabasas. According to Cohen, the settlement also “cleanses Graw’s employment record” of an untruthful MTA finding of termination with cause. Cohen said he had recommended that his client take the matter to trial, and possibly receive more money, but that Graw chose instead to “get on with his life.” Graw, who now has a college-level teaching career in California, was not available for comment.