ab703e93ba
CALL_AUCTION枚举原拒单(unsupported), 现撮合用开盘价(open, 集合竞价确定开盘价). 当前定价同NEXT_OPEN(均为open); 未来区分开盘/尾盘集合竞价需扩枚举. test: call_auction fills@open(原rejected用例改).