As a developer, I want a jacoco test coverage report on every build

[james-d-brown]

Given a build pipeline
When each build completes with associated junit tests
Then I expect to see a jacoco code coverage report in the build/reports directory
So that I can eventually display this information on the github landing page

( Last step isn't necessarily required to complete this ticket, but would be nice. )

[james-d-brown]

Was working at some point, still has the jacoco plugin applied in our build.gradle, but it appears not to generate a report on each build. Step (1): test the jacocoTestReport task. Step (2): if it doesn't work, fix it, if it does, configure to run on each build.

https://docs.gradle.org/current/userguide/jacoco_plugin.html

[james-d-brown]

Context is that a solutions architect working with the customer was asking about code coverage recently and we couldn't immediately point to this.

[james-d-brown]

Second part of this ticket (display on landing page) can be completed in #378.