Apply the recommended new usage of QThread to Room

Signed-off-by: Takashiro <takashiro@qq.com>
Apply the new usage of QThread to RoomDriver

Signed-off-by: Takashiro <takashiro@qq.com>
Abort the game on exit so as to fix the problem of memory leak(RoomDriver)

Signed-off-by: Takashiro <takashiro@qq.com>