work in progress: cleaning up and decomposing tests
refactored WhenPrintingVerbosely to use the notifier
Refactored WhenPrintingASuccessSummary
Refactored some more test classes
refactored TC tests
Deleted existing notifier tests (to be rewritten)
Cleaned up ReporterNotifier interface
Added tests for run_suite
added tests for run_context
added more tests for ReporterNotifier
Deleted SuiteViewModel et al