Add an active/standby scenario test

This patch adds a tempest scenario test for the active/standby topology.
It starts an active/standby load balancer, deletes the master amphora,
and validates that the load balancer is still working.

Change-Id: Ibcd5552a67cea650edc72bfaa986357267ca2407
diff --git a/zuul.d/jobs.yaml b/zuul.d/jobs.yaml
index d342aff..aac2460 100644
--- a/zuul.d/jobs.yaml
+++ b/zuul.d/jobs.yaml
@@ -556,7 +556,6 @@
               loadbalancer_topology: ACTIVE_STANDBY
             task_flow:
               engine: parallel
-              devstack_local_conf:
         test-config:
           "$TEMPEST_CONFIG":
             load_balancer:
@@ -608,3 +607,32 @@
     name: octavia-v2-act-stdby-iptables-dsvm-py2-scenario-stable-queens
     parent: octavia-v2-act-stdby-iptables-dsvm-py2-scenario
     override-checkout: stable/queens
+
+- job:
+    name: octavia-v2-act-stdby-dsvm-scenario
+    parent: octavia-dsvm-live-base
+    vars:
+      devstack_local_conf:
+        post-config:
+          $OCTAVIA_CONF:
+            api_settings:
+              api_v1_enabled: False
+            controller_worker:
+              loadbalancer_topology: ACTIVE_STANDBY
+            task_flow:
+              engine: parallel
+      tempest_concurrency: 2
+      tempest_test_regex: ^octavia_tempest_plugin.tests.act_stdby_scenario.v2.test_active_standby\.
+      tox_envlist: all
+
+- job:
+    name: octavia-v2-act-stdby-dsvm-py2-scenario
+    parent: octavia-v2-act-stdby-dsvm-scenario
+    vars:
+      devstack_localrc:
+        USE_PYTHON3: False
+
+- job:
+    name: octavia-v2-act-stdby-dsvm-scenario-stable-stein
+    parent: octavia-v2-act-stdby-dsvm-scenario
+    override-checkout: stable/stein