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: I5aa55a9582127ce07efd841b15857c272bebdb9f

Author: openstackadmin

.zuul.yaml

@@ -225,7 +225,7 @@
       - osc-tox-unit-tips
       - openstack-cover-jobs
       - openstack-lower-constraints-jobs
-      - openstack-python3-ussuri-jobs
+      - openstack-python3-victoria-jobs
       - publish-openstack-docs-pti
       - check-requirements
       - release-notes-jobs-python3