Add Python3 victoria unit tests

This is an automatically generated patch to ensure unit testing
is in place for all the of the tested runtimes for victoria.

See also the PTI in governance [1].

[1]: https://governance.openstack.org/tc/reference/project-testing-interface.html

Change-Id: I8127e92439d2393ec7a4797a5ee7776ecc29c2d1

zuul.d/layout.yaml

@@ -2,4 +2,4 @@
     templates:
       - check-requirements
       - openstack-cover-jobs
-      - openstack-python3-ussuri-jobs
+      - openstack-python3-victoria-jobs