Arquillian must scale to a high number of full-layer integration tests

A full-layer integration test is an arquillian test which deploys the entire war of a webapp (for example guvnor-webapp) and then runs a higher number of test classes and test methods on it.

Currently arquillian doesn't scale out to that. For different reasons.
The main reason is ARQ-197: every test case starts the container again and after a while tomcat6-managed goes out of memory.

But there are other reasons, such as high difficulty setting up an @Deployment method. SHRINKWRAP-325 is trying to fix that later.

This should be tested and any solutions should work both from the mvn command line and the IDE (without forcing the users to jump through many hoops to set up his IDE just right for arquillian).