Scaffold tests

Here's the change to add test generation to the reporters scaffold.

The template test doesn't use a fixture which is consistent with the template used for rules tests.  I thought to use a simple structure for the test template.  But, I see that all of the reporter tests (except Canary) use a fixture.  If anyone thinks it would be better to generate a fixture based test so that it lines up better with existing examples I'd be happy to make that change.