Add Code Coverage Metrics For Innkeeper Plugin

[Gavinok]

Consider using coveralls to ensure code coverage for Innkeeper plugin

[Gavinok]

Coverage is being added in #1591 but we still need to integrate coveralls to notify users of the current coverage the current setup may be more than enough for our current usecase

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days.