fix value for api host integration test
fix value for api host integration test

The expected value has been cut in half corresponding to a halving of
the default price for the host.

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