run-production-playbook-post: add bridge for playbook

I3e99b80e442db0cc87f8e8c9728b7697a5e4d1d3 added this to ensure that we
always collect logs.  However, since this doesn't have bridge
dynamically defined in the playbook, it doesn't run any of the steps.
On the plus side, it doesn't error either.

Change-Id: I97beecbc48c83b9dea661a61e21e0d0d29ca4733

playbooks/zuul/run-production-playbook-post.yaml

@@ -1,3 +1,16 @@
+- hosts: localhost
+  tasks:
+    - name: Add bridge.o.o to inventory for playbook
+      add_host:
+        name: bridge.openstack.org
+        ansible_python_interpreter: python3
+        ansible_user: zuul
+        # Without setting ansible_host directly, mirror-workspace-git-repos
+        # gets sad because if delegate_to localhost and with add_host that
+        # ends up with ansible_host being localhost.
+        ansible_host: bridge.openstack.org
+        ansible_port: 22
+
 - hosts: bridge.openstack.org
   tasks:
     - name: Encrypt log