Setting enabled=false still loads clover and expects a license,
it just doesn't instrument.
Define includeTasks so we don't include any real tasks as a
work-around for this.
Not entirely sure how to enable it again at runtime though :)
`./gradlew clean cloverAggregateReport` in meta will create a new
report for all the projects with tests.
Plugins that don't have any tests won't show up at all.