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.
The containerId needs to use jboss74x as cargo does not use EAP names. However, JBoss 7.4 as such wasn't released into the community, so only binary here that we can use is EAP 6.3.x. 

I agree that it should be consistent, will fix it. I am just not sure if to use jboss74x or eap63x. 

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