(Recasts, adds detail, background) KUALA LUMPUR, May 1 (Reuters) – Shares of Malaysian AirlineSystem (MAS) will be suspended from trading onWednesday, two sources said, amid speculation that the nationalcarrier’s proposed $ 364 million share swap with AirAsia will be cancelled. Trading of the stock will be halted due to “a pendingcorporate announcement,” according to one [...]