v2.1.x Chore - Improve test-coverage reports

[reactive-firewall]

Context

• CI/CD now mostly, but not exclusively, excludes the test-code from coverage reports, this means that the non-excluded coverage skews the results to lower values than if the tests were not excluded at all.

solution

• explore excluding the rest of the test code from the reports, or determine a roll-back is needed.

• implement coverage improvements strategically to improve overall test coverage.