Add infection test tool

[brettmc]

• run unit tests in random order running in random order highlights some interference between tests (mostly logging being enabled), and is a requirement for mutation testing (ie, all tests must pass when executed in a random order). Fix the failing tests so that everything consistently passes when tests are run in random order.
• adding infection mutation testing this adds the ability to run infection. It generates a lot of output, which is an exercise for another PR...

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 74.08%. Comparing base (500f6ee) to head (06b4349).

Additional details and impacted files

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