tests: Add basic integration testing

Add basic integration testing of the hypervisor using a cloud-init to
configure the VM at boot and SSH to control it at runtime.

Initial test just boots the VM up checks some basic resources and
reboots. With a second test that calls into the first to check that
subsequent tests work correctly.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>

test_data/cloud-init/openstack/latest/meta_data.json

@@ -0,0 +1,3 @@
+{
+  "hostname" : "cloud"
+}