[CentOS] yum files in /tmp

Wed Dec 6 13:54:48 UTC 2017
Jerry Geis <jerry.geis at gmail.com>

I am getting /tmp/yum_save_tx.2017-12..... files in /tmp one every hour.
What process is making these files ???
I have stopped PackageKit so its not running.

I am running CentOS 7.4. With GNOME desktop. Thanks

Jerry