Add traffic tests using an IPv6 VIP

Adds a traffic scenario test that has an IPv6 VIP address and mixed
IPv4/IPv6 members. It tests that connections to the IPv6 VIP are
evenly balanced across the mixed members.

Change-Id: I6bb7be14379174be9018a74b07356ecd85089f45
Story: 1627892
Task: 27532
Depends-On: https://review.openstack.org/#/c/611460/
diff --git a/zuul.d/jobs.yaml b/zuul.d/jobs.yaml
index 425adbd..e90c706 100644
--- a/zuul.d/jobs.yaml
+++ b/zuul.d/jobs.yaml
@@ -237,6 +237,7 @@
           o-cw: true
           o-hm: true
           o-hk: true
+          q-agt: true
 
 - job:
     name: octavia-dsvm-noop-base