Add Python3 zed unit tests
Add Python3 zed unit tests

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

See also the PTI in governance [1].

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

Change-Id: I89cfe3a85620f842bb05df52e4b5079ad62057d1

openstack/tacker,openstack/tacker,openstack/tacker