This commit partially rewrites the `testPrios` queue test, in such a way
that it's now easier to inspect the final schedule and the occurrence of events.
Albeit not perfect, it should be less sensitive to random failures,
like the ones we have been observing on CI.

Merge remote-tracking branch 'origin/184-dev-add-support-for-multiple-languages-in-ini-file' into dev-merge

Also, added a basic GraphQL endpoint.