fix a bug in dlock test due to async exec flow
fix a bug in dlock test due to async exec flow

qinzuoyan/rDSN,imzhenyu/rDSN,glglwty/rDSN,lshmouse/rDSN,shengofsun/rDSN,lshmouse/rDSN,Microsoft/rDSN,shengofsun/rDSN,lshmouse/rDSN,mcfatealan/rDSN,glglwty/rDSN,shengofsun/rDSN,Microsoft/rDSN,qinzuoyan/rDSN,Microsoft/rDSN,Microsoft/rDSN,shengofsun/rDSN,imzhenyu/rDSN,glglwty/rDSN,imzhenyu/rDSN,imzhenyu/rDSN,imzhenyu/rDSN,Microsoft/rDSN,mcfatealan/rDSN,mcfatealan/rDSN,imzhenyu/rDSN,lshmouse/rDSN,lshmouse/rDSN,qinzuoyan/rDSN,imzhenyu/rDSN,lshmouse/rDSN,Microsoft/rDSN,lshmouse/rDSN,shengofsun/rDSN,imzhenyu/rDSN,qinzuoyan/rDSN,qinzuoyan/rDSN,shengofsun/rDSN,qinzuoyan/rDSN,Microsoft/rDSN,qinzuoyan/rDSN,Microsoft/rDSN,qinzuoyan/rDSN,mcfatealan/rDSN,glglwty/rDSN,glglwty/rDSN,lshmouse/rDSN,shengofsun/rDSN,shengofsun/rDSN