Add Python3 wallaby unit tests
Add Python3 wallaby unit tests

This update is to switch to wallaby jobs run with the latest tested
runtimes. See Project Testing Interface for the details [1].

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

Signed-off-by: Yasufumi Ogawa <0cbdead7c4bf8da8f6bef3a7960478ac9af89f0a@gmail.com>
Change-Id: Ic57383420558744f48eeb12eb8cbe6b1ab3dc0e3

openstack/tosca-parser,openstack/tosca-parser