[atomic-wg] Issue #329: Guidelines have dnf -y install <package>; dnf clean all; instead of using "&&"

[Micah Abbott]

The issue: `Guidelines have dnf -y install <package>; dnf clean all;  instead of using "&&"` of project: `atomic-wg` has been assigned to `miabbott` by miabbott.

https://pagure.io/atomic-wg/issue/329