Add Python3 yoga unit tests
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: I9cd5ae0f91d6a53bfdbd8b2ec50e43a4e208b793

openstack/monasca-persister,openstack/monasca-persister,openstack/monasca-persister