message: [cluster-test] Terminate ct on SIGHUP
  When ssh connection terminated, process receives SIGHUP
  We want to terminate ct at this point to make sure when circle job is cancelled we no longer keep cluster test session running.
  Closes:
  Approved by: sausagee
diff: @@ -43,7 +43,9 @@ timeout $WAIT_TO bash -c 'while [ $(docker ps --quiet --filter name=$CONTAINER)
  # Cleanup container in case it was terminated but not removed (no -f flags to avoid killing alive container)
  docker rm $CONTAINER 2>/dev/null >/dev/null || :
  -trap "echo Terminating on signal; docker rm -f $CONTAINER >/dev/null" SIGINT SIGTERM
  +trap "echo Terminating on SIGINT; docker rm -f $CONTAINER >/dev/null" SIGINT
  +trap "echo Terminating on SIGTERM; docker rm -f $CONTAINER >/dev/null" SIGTERM
  +trap "echo Terminating on SIGHUP; docker rm -f $CONTAINER >/dev/null" SIGHUP
  VARS="-e SLACK_CHANGELOG_URL"
  