Kie server: using cargo + failsafe to execute integration tests

The tests are now completely independent of the container setup, which makes them very easy to execute with other/custom containers. 

I am planning to add more integration tests in near future.
I would be inclined to use eap63x where we can, because it is probably better established that jboss74x. However, the containerId would this need to be "jboss74x"