add a test function TestUploadedBytesReporting for the uploadedbytes field returned by the /renter/files API
add a test function TestUploadedBytesReporting for the uploadedbytes field returned by the /renter/files API

mtlynch/Sia,NebulousLabs/Sia,mharkus/Sia,mharkus/Sia,mtlynch/Sia,NebulousLabs/Sia