1148475 - Adds rpm_exec to all systemd systems

https://bugzilla.redhat.com/show_bug.cgi?id=1148475

See [this comment on the bug](https://bugzilla.redhat.com/show_bug.cgi?id=1148475#c3) for some explanation.

I was able to produce the avc denials using the same version reported in the bug. I rebuilt the policy with this PR and the workers start properly in enforcing mode now.