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: I319b0c36419ff9e562ae15d4d1758d9c3be3d76e

zuul.d/layout.yaml

@@ -1,7 +1,7 @@
 - project:
     templates:
       - check-requirements
-      - openstack-python3-ussuri-jobs
+      - openstack-python3-victoria-jobs
       - openstack-lower-constraints-jobs
       - release-notes-jobs-python3
       - validations-common-molecule-jobs