Add Python3 xena unit tests
Add Python3 xena unit tests

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

See also the PTI in governance [1].

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

Change-Id: I0781cc489024f81a3cb3ec12ba66244a084843b2
Depends-On: I43dd37f975b49de21cd34bbc8ce9378e09e88420

stackforge/ec2-api,openstack/ec2-api,openstack/ec2-api,stackforge/ec2-api