CI: Pull images before upgrade

This is the documented procedure.

Change-Id: I09ca99e92b112621d66b564a88b13658632242f5

tests/upgrade.sh

@@ -10,10 +10,8 @@ export PYTHONUNBUFFERED=1
 function upgrade {
     RAW_INVENTORY=/etc/kolla/inventory
 
-    # TODO(jeffrey4l): need run a real upgrade
     tools/kolla-ansible -i ${RAW_INVENTORY} -vvv prechecks &> /tmp/logs/ansible/upgrade-prechecks
-    # TODO(mgoddard): add pull action when we have a local registry service in
-    # CI.
+    tools/kolla-ansible -i ${RAW_INVENTORY} -vvv pull &> /tmp/logs/ansible/pull-upgrade
     tools/kolla-ansible -i ${RAW_INVENTORY} -vvv upgrade &> /tmp/logs/ansible/upgrade
     tools/kolla-ansible -i ${RAW_INVENTORY} -vvv check &> /tmp/logs/ansible/check-upgrade
 }