CSIT testing

[ekorian]

https://wiki.fd.io/view/CSIT/Tutorials/Vagrant/Virtualbox/Ubuntu#Start_Vagrant_VM_environment

https://wiki.fd.io/view/CSIT/Documentation#Writing_a_test_case

https://wiki.fd.io/view/CSIT

[IurmanJ]

Put on hold for now, as there is a problem with ipv4 functional tests (some tests pass, others -the majority- fail). Did not test it for performance tests, though.