Expose test artifacts to the Gitlab CI interface

Make tests generate JUnit artifacts and expose them to the Gitlab CI UI.

test-driver

@@ -131,7 +131,7 @@ do_provision() {
 do_test() {
     for playbook in "${float_dir}/test/integration-test.yml" "$@"; do
         log Running test playbook ${playbook}
-        ANSIBLE_STDOUT_CALLBACK=default ${float_dir}/float run ${playbook} \
+        ANSIBLE_STDOUT_CALLBACK=default ANSIBLE_CALLBACKS_ENABLED=default ${float_dir}/float run -vv ${playbook} \
             || die "test playbook failed"
     done
 }