de861315e2
Implement upgrade testing for os_neutron role. This patch adds an upgrade testenv, which configures a previous version of Neutron, and the test-vars from the previous stable branch to be used by the previous version of Neutron. We don't run functional tests after the initial stable/newton deploy because a working stable/newton branch is already tested, and it's assumed it worked if the upgrade works too - which is more efficient. This follows the pattern setup for Keystone in: https://review.openstack.org/#/c/384269/ Change-Id: Id4b2cf8197ca902ab5b3d925175c3d7c698ec802 Implements: blueprint upgrade-testing