Add Groovy source dirs earlier
Add Groovy source dirs earlier

vaibhav345/lenskit,martinlaz/lenskit,chrysalag/lenskit,linjunleo/lenskit,binweiwu/lenskit,amaliujia/lenskit,linjunleo/lenskit,blankazucenalg/lenskit,kluver/lenskit,vaibhav345/lenskit,vijayvani/Lenskit,aglne/lenskit,chrysalag/lenskit,kluver/lenskit,kluver/lenskit,kluver/lenskit,aglne/lenskit,martinlaz/lenskit,blankazucenalg/lenskit,kluver/lenskit,vaibhav345/lenskit,tajinder-txstate/lenskit,tajinder-txstate/lenskit,tajinder-txstate/lenskit,vijayvani/Lenskit,binweiwu/lenskit,amaliujia/lenskit,tajinder-txstate/lenskit,vaibhav345/lenskit