Removed snabb-nfv-driver-test (not needed)
Remove CI_SSH_USER

This should be set in ~/.ssh/config via the User option.
test-run: better logging
Vagrantfile: Allow automatic unique ID

Give up on trying to map all Vagrants on a given shard to the same
VirtualBox. Instead try hard to destroy old Vagrants after test and
try *really* hard to kill off old Vagrants on ./stop shutdown.
vagrant-test-template/runtest.sh: Set exit code as shellci expects
README.md: Updated for latest version.