fix network_test race condition
fix network_test race condition

mtlynch/Sia,MrStrong/Sia,NebulousLabs/Sia,ChrisSchinnerl/Sia,rivine/rivine,mharkus/Sia,johnathanhowell/Sia,mtlynch/Sia,NebulousLabs/Sia,ChrisSchinnerl/Sia,mnsl/Sia,cyrozap/Sia,mnsl/Sia,MrStrong/Sia,mharkus/Sia,kustomzone/Sia,ericflo/Sia,Mingling94/Sia,ericflo/Sia,rivine/rivine