Marko introduced some base classes a while ago but they are not used by all the tests: most of the tests still extends Arquillian directly. And some of them do not extend anything.

It would be nice to make it consistent, especially because we would need a base class to make Assertj available to all the tests.

Moreover the initialization of the deployment war is not exactly the same when we depend on the base class introduced by Marko and it can lead to errors visible only in container mode when using the base class without care. Making all the tests consistent will hopefully help to mitigate this.