replication_test: fix case 603
replication_test: fix case 603

case 603 has too strict constraint for replica status, give it a
looser one

shengofsun/rDSN,shengofsun/rDSN,shengofsun/rDSN,shengofsun/rDSN,shengofsun/rDSN,shengofsun/rDSN,shengofsun/rDSN,shengofsun/rDSN