CI: pull images before deploy

It will allow us to fail fast when pulling the image
is a problem - instead of failing in the middle of
deployment.

Change-Id: I017cddcfbbc5449e63d807385216b94e74503c9b
(cherry picked from commit 8dcb56f)

Author: mnasiadka

tests/deploy.sh

@@ -18,8 +18,7 @@ function deploy {
     fi
     # Actually do the deployment
     tools/kolla-ansible -i ${RAW_INVENTORY} -vvv prechecks &> /tmp/logs/ansible/deploy-prechecks
-    # TODO(jeffrey4l): add pull action when we have a local registry
-    # service in CI
+    tools/kolla-ansible -i ${RAW_INVENTORY} -vvv pull &> /tmp/logs/ansible/pull
     tools/kolla-ansible -i ${RAW_INVENTORY} -vvv deploy &> /tmp/logs/ansible/deploy
     tools/kolla-ansible -i ${RAW_INVENTORY} -vvv post-deploy &> /tmp/logs/ansible/post-deploy
     tools/kolla-ansible -i ${RAW_INVENTORY} -vvv check &> /tmp/logs/ansible/check-deploy