Add Python3 yoga unit tests

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

See also the PTI in governance [1].

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

Change-Id: Ieecbd6b33b5d41b332e91b793d5f1f3d8c529a1b

Author: openstackadmin

.zuul.yaml

@@ -2,6 +2,6 @@
     templates:
       - check-requirements
       - horizon-non-primary-django-jobs
-      - openstack-python3-xena-jobs
+      - openstack-python3-yoga-jobs
       - publish-openstack-docs-pti
       - release-notes-jobs-python3