HOWTO (will create a wiki page once one is created for CSIT project):
 - copy Vagrantfile to separate dir on host
 - vagrant up --parallel
    sit-back-and-relax
 - from VM that has access to the same host-only network (192.168.255.0 above)
    - copy your ssh-key to csit@192.168.255.{101,102,250}
    - cd ${csit_dir}
    - virtualenv & pip as in README
    - PYTHONPATH=`pwd` resources/tools/topology/update_topology.py \
        topologies/available/vagrant.yaml \
        -o topologies/available/vagrant_pci.yaml
    - PYTHONPATH=`pwd` pybot -L TRACE \
        -v TOPOLOGY_PATH:topologies/available/vagrant_pci.yaml -s \
        "bridge domain" tests
    - see tests results