Update tests for source and sink simulations.
Update tests for source and sink simulations.

Baaaaam/cyclus,gidden/cyclus,gidden/cyclus,rwcarlsen/cyclus,hodger/cyclus,mbmcgarry/cyclus,mbmcgarry/cyclus,gidden/cyclus,hodger/cyclus,gidden/cyclus,mbmcgarry/cyclus,mbmcgarry/cyclus,rwcarlsen/cyclus,hodger/cyclus,rwcarlsen/cyclus,Baaaaam/cyclus,hodger/cyclus,hodger/cyclus,rwcarlsen/cyclus,Baaaaam/cyclus