Fix Java file paths and packages in OptaPlanner quickstart

[yurloc]

No description provided.

[geoand]

Thanks!

Do you also plan to update the corresponding quickstart?

[geoand]

Asking because I see that the docs changes are different from what the quickstarts has for tests packages

[yurloc]

@geoand Good catch. I think the article should be consistent with the quickstart source code. I'll update the PR.

@ge0ffrey the quickstart uses org.acme.optaplanner as the root package. I'll update the article to the same instead of just org.acme, ok?

[ge0ffrey]

@yurloc Yes, thanks

[yurloc]

@geoand I haven't touched the quickstart code in the other repo. Instead I made sure that this quickstart article is consistent with the solution in the quickstart repo.

[geoand]

Cool, thanks!