Use explicit version or range for all deps.
Use explicit version or range for all deps.

+ Use vespa parent to get dependency version properties.
+ Add junit as test dep for a more realistic setup, plus it
  actually affects the versions of provided deps.

vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa