Add tests to cover trunks

This patch set adds tests to cver the neutron trunks API [0].
Test lists, gets, creates, updates, and deletes trunks.
Part of "Increase Neutron RBAC Coverage" initiative [1]

[0] https://developer.openstack.org/api-ref/network/v2/index.html#trunk-networking
[1] https://storyboard.openstack.org/#!/story/2002641

Story: 2002641
Task: 22326
Change-Id: Ie59f02f5ecc1d04a16fb178444f231e4791e2079
diff --git a/.zuul.yaml b/.zuul.yaml
index 5701eb4..d02eada 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -25,6 +25,7 @@
       devstack_services:
         tempest: true
         neutron: true
+        neutron-trunk: true
       tempest_concurrency: 2
       tempest_test_regex: (?!.*\[.*\bslow\b.*\])(^patrole_tempest_plugin\.tests\.api)
       tox_envlist: all-plugin