Add integration test:

Add some shell scripts for performing integration tests.

* test/check-deps
    verify that all test dependencies are installed (nova, ansible, openstack creds)

* test/setup
    boot some openstack vms with public ips, on which to perform a test deployment

* test/run
    perform a full run of site.yml against the vms booted above

* test/cleanup
    destroy the test vms