Add Test Cases (tests are not running through in node.js example - two pass, others fail)

[mhameister]

Tutorials: https://developers.sap.com/tutorials/add-test-cases.html

Thanks so much at first for the tutorial, which is very helpful.

I found an issue which I could not resolve about the unit tests. The first two are passing, but all others (13-15) are failing with '401 unauthorized'.

Could you maybe check, if the provided snipped is correct?