Add octavia-v2-dsvm-scenario-ubuntu-xenial job

This patch adds a xenial scenario job to test xenial controller host
with a xenial amphora image.
This is intended for testing the stable branches.

Change-Id: Iba83543ac92db547fb276947039b00722cf1acee
diff --git a/zuul.d/jobs.yaml b/zuul.d/jobs.yaml
index 8c8ac73..5df5b12 100644
--- a/zuul.d/jobs.yaml
+++ b/zuul.d/jobs.yaml
@@ -364,6 +364,15 @@
         OCTAVIA_AMP_DISTRIBUTION_RELEASE_ID: bionic
 
 - job:
+    name: octavia-v2-dsvm-scenario-ubuntu-xenial
+    parent: octavia-v2-dsvm-scenario
+    nodeset: openstack-single-node-xenial
+    vars:
+      devstack_localrc:
+        OCTAVIA_AMP_BASE_OS: ubuntu
+        OCTAVIA_AMP_DISTRIBUTION_RELEASE_ID: xenial
+
+- job:
     name: octavia-v2-dsvm-tls-barbican
     parent: octavia-v2-dsvm-scenario
     required-projects: