Add integration test for the trivial cycle simulation.
Add integration test for the trivial cycle simulation.

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