We want to default to running all tox environments under python 3, so
set the basepython value in each environment.
We do not want to specify a minor version number, because we do not
want to have to update the file every time we upgrade python.
We do not want to set the override once in testenv, because that
breaks the more specific versions used in default environments like
py35 and py36.
Change-Id: I7dfde1d3a1bf58b3913ceadb18aa3bf3c31ac795
This tempest plugin is being split out of the main blazar project in
accordance with Queens goal "Split Tempest Plugins into Separate
Repos/Projects"[1]. This patch applies the standard boilerplate files
for OpenStack projects so that it can stand on its own.
[1] https://governance.openstack.org/tc/goals/queens/split-tempest-plugins.html
