Update the live jobs to set higher retries

Previously the retry default in Octavia was set very high, 300 retries,
to accomidate OpenStack clouds running without nested virtualization.
In these environments it can take nova up to 20 minutes to boot a VM.

The main Octavia is setting these to a lower, more production friendly
default values. Since some of the OpenStack nodepool instances run on
clouds that do not have nested virtualization enabled, we need to set
these back to 300 for the zuul jobs.

Change-Id: I4ae18e160ecad420095c9650d87e4e3629ee1c0c
diff --git a/zuul.d/jobs.yaml b/zuul.d/jobs.yaml
index f5426cc..d53fa42 100644
--- a/zuul.d/jobs.yaml
+++ b/zuul.d/jobs.yaml
@@ -91,6 +91,13 @@
     vars:
       devstack_localrc:
         DIB_LOCAL_ELEMENTS: openstack-ci-mirrors
+      devstack_local_conf:
+        post-config:
+          $OCTAVIA_CONF:
+            haproxy_amphora:
+              # Set these higher for non-nested virt nodepool instances
+              connection_max_retries: 300
+              build_active_retries: 300
       devstack_services:
         neutron-qos: true
       devstack_plugins: