fix contractor test race condition
fix contractor test race condition

ericflo/Sia,NebulousLabs/Sia,MrStrong/Sia,MrStrong/Sia,ChrisSchinnerl/Sia,mtlynch/Sia,NebulousLabs/Sia,ericflo/Sia,mharkus/Sia,ChrisSchinnerl/Sia,mharkus/Sia,mtlynch/Sia