In patch [1] we moved neutron_tempest_plugin test executions to
neutron-tempest-plugin repository.
That moves us forward with unifying the way of executing tests
after OVN merge.
[1] https://review.opendev.org/#/c/734832/
Change-Id: Iecca2649fc5e066fabe7f4b4746094506b595f0b
(cherry picked from commit 193df8279d)