message: [cluster-test] Pass slack url vars to container
  Closes:
  Approved by: ankushagarwal
diff: @@ -43,7 +43,9 @@ docker rm $CONTAINER 2>/dev/null >/dev/null || :
  trap "echo Terminating on signal; docker rm -f $CONTAINER >/dev/null" SIGINT SIGTERM
  +VARS="-e SLACK_LOG_URL -e SLACK_CHANGELOG_URL"
  +
  # This could in theory fail due to concurrency, but it seem unlikely
  -docker run -v /libra_rsa:/libra_rsa --name $CONTAINER --rm $DOCKER_IMAGE $* &
  +docker run $VARS -v /libra_rsa:/libra_rsa --name $CONTAINER --rm $DOCKER_IMAGE $* &
  wait
  