Fixes the versioning issue in live tests as well as other stability issues

Specifically, neutron live tests.
I recall many places where having the singleThreaded attribute caused *all* tests (not only the ones in the configured test class) to run single threaded.
If I'm not wrong, that is because the tests are configured with the `parallel=methods` by default in the parent pom, but having a deeper look, the neutron one overrides that and configures `parallel=classes`, which may allow this to work properly (with a different level of concurrency, though).
Could you verify that only tests in the same class run single threaded?