message: Don't fail tests if docker cleanup fails.
diff: @@ -87,13 +87,17 @@ else
  fi
  echo "Cleaning up old Docker images..."
  +
  +set +e
  # delete stopped containers
  -docker rm $(docker ps -a -q) || true
  +docker rm $(docker ps -a -q)
  # delete images except for console builder (fails on images currently used)
  TO_DELETE=$(docker images | grep -F -v quay.io/coreos/tectonic-console-builder | awk '{print $3}' | grep -v IMAGE)
  -docker rmi $TO_DELETE || true
  +docker rmi $TO_DELETE
  # delete orphaned volumes
  -docker volume ls -qf dangling=true | xargs -r docker volume rm || true
  +docker volume ls -qf dangling=true | xargs -r docker volume rm
  +set -e
  +
  echo "Done!"
  