[WFLY-490] variant of domain tests that use .properties file authorization

This is really a tiny modification of 3 of the existing RBAC tests in domain. The only difference is that these tests use authorization against the `mgmt-groups.properties` file, otherwise it's the same. The reason why I'm submitting this is that we need this situation tested for CCC.

It's fine if we don't agree with this being committed (after all, it's a lot of code that don't add much of value). My colleague working on CCC stated that they don't really need it in the project/product TS, they can maintain it in their own repo. But it would of course be nice to have it :-)