Investigate test failure of BasicAuthTest

[rzo1]

BasicAuthTest

Not sure what changed to make this test fail. The code never allowed anything more than provide credentials, but using HttpClient manually, I would use following code to define that I want authentication to be done preemptively:

		final BasicScheme basicAuth = new BasicScheme();
		basicAuth.initPreemptive(new UsernamePasswordCredentials(userName, password));

So now I'm wondering how this used to work. This might require code changes unless you know of a use case where this (still) works. I expect the test to work the same as when it was written in Spock syntax (WireMock does the real magic in both the Spock and JUnit tests).

Looks like Spock/Groovy tests were not executed for a (long) time (see #117) We should dig into the JUnit5 migrated code to understand what is going on here and how we can fix it.