The build fails when an explicit version is set, with the following
error:
The following artifacts could not be resolved:
io.brooklyn:brooklyn-test-support:jar:0.1.0-SNAPSHOT,
io.brooklyn:brooklyn-logback-includes:jar:0.1.0-SNAPSHOT

Caused by the usage of ${project.version} in the parent dependencies
instead of ${brooklyn.version}
Instead I fixed the bundle version to 0.1.0 with the
maven-bundle-plugin. 

This project is tied to the brooklyn version in a way because its build
depends on the parent pom.