Fix settings generation in tests

[didierofrivia]

In some integration tests we are relying on random namespace generation, which makes it hard to test dependent services expecting an ENV var value to be already setup.

[didierofrivia]

This is related to #69, since right now the flow accepting Kuadrant services installed in a custom namespace is broken

[didierofrivia]

This might not need to get rid of the random namespace generation, but to make the most of it and run test in parallel, since the integration ones are taking way longer than any human can afford time to waste on them.

[alexsnaps]

@didierofrivia Is this still relevant?

[KevFan]

@didierofrivia can this be closed? 🤔 We have the integration tests running in parallel so not sure if this still needs to be addressed