Fix issues from PR 277

[dschiese]

• fixed query
• added GitHub action to test maven build on PR's
• fixed tests#

Refers to #277

[anbo-de]

@dschiese What is the intention of defining default properties here: https://github.com/WDAqua/Qanary/pull/280/files#diff-d00a1105ccfc92a97dee3824ec0b252fc502cad0f28b8f7f3982f71d05fc27a9R135 ?

[dschiese]

@dschiese What is the intention of defining default properties here: https://github.com/WDAqua/Qanary/pull/280/files#diff-d00a1105ccfc92a97dee3824ec0b252fc502cad0f28b8f7f3982f71d05fc27a9R135 ?

C.f. #277
It's due to the failing tests. There are some different options to consider:

1. remove qald_evaluator as dependency (is it needed?)
2. add the dependencies' required properties (currently)
3. Run tests from each module

With regards to the 3rd approach: When running the tests for each submodule separately everything works just fine. However, running them from the parent directory fails. Maybe you've got a better solution?