Currently the XTS tests are built using Ant, they need to be updated to maven to be consistent with the rest of Narayana. The use of Maven should be consistent with the other Narayana sub-components. For example you should inherit from a parent pom.xml and manage dependencies and versions in the same way.
My understanding is that there is a script in place that manages the starting and stopping of a number of JBoss servers and the deployment of various artefacts required by the tests. This script also runs the individual tests. This process script to be replaced with Arquillian in order to be consistent with the other Narayana tests. See "ArjunaJTA/quickstarts/jee_transactional_app/" for an example of how we are using Arquillian for this purpose.