message: ci: rotate credentials
diff: @@ -20,7 +20,7 @@ do
  done
  if [ "$TRAVIS_PULL_REQUEST" == "false" ] && [ "$want_push" == "true" ]
  then
  - docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD
  + docker login -u $DOCKERHUB_USERNAME -p $DOCKERHUB_PASSWORD
  docker push lyft/envoy:latest
  docker tag lyft/envoy:latest lyft/envoy:$TRAVIS_COMMIT
  docker push lyft/envoy:$TRAVIS_COMMIT
  