* pr/405:
  Upgrade maven wrapper

Closes gh-405

* pr/397:
  Polish "URL Cleanup"
  URL Cleanup

Closes gh-397

See gh-397

* pr/396:
  URL Cleanup

Closes gh-396

This reverts commit ab567242.

* pr/383:
  Remove SonarQube configuration file

Closes gh-383

The @DataJpaTests creates all the repositories. There's no need
for a filter (and there aren't any matching @Service beans anyway).

* pr/369:
  Fix links

Closes gh-369

See gh-361

* pr/358:
  Polish "Add documentation for IntelliJ IDEA"
  Add documentation for IntelliJ IDEA

Closes gh-358

See gh-358

* pr/359:
  Fix indent in readme.md

Closes gh-359

See #339

* pr/335:
  Polish "Clarify cache configuration"
  Clarify cache configuration

Closes gh-335

See gh-335