Removed awaitUninterruptibly() calls in RestExpress.shutdown() for bossGroup and workerGroup so shutdown occurs more quickly.
Removed awaitUninterruptibly() calls in RestExpress.shutdown() for bossGroup and workerGroup so shutdown occurs more quickly.

cailin186/RestExpress,jasonchaffee/RestExpress,cailin186/RestExpress,jyx140521/RestExpress,jasonchaffee/RestExpress,jyx140521/RestExpress,RestExpress/RestExpress,RestExpress/RestExpress