by running calendar and newsfeed tests last.
Additional change: allow unit tests to run parallel
This is no fix of the real issue of calendar and newsfeed tests but I
moved them to the end of the tests so other tests are not failing
anymore.
There are coming follow up PR's for the real fixes (when I find the
culprits).
With these change we can stay with the async changes done by @rejas and
https://github.com/MichMich/MagicMirror/pull/3060 is obsolete.
Refactored the mock data generation for the tests so we can use plain
JSON files for the data and read it in a more general way.
Comments welcome!
Co-authored-by: veeck <michael@veeck.de>
