Add tests for report_results module.
    
    The tests attempt to exercise report_results with minimal patching and
    the patching that is done attempts to be straightforward. This does
    result in many duplicate assert calls across tests checking things like
    calls to 'print' to verify program flow progressed as expected during
    the test.
    
    Tests were coverage guided. Additional pull requests will follow to shore up
    additional gaps in coverage.