(GH-1055) Fix for `--random-fully`
(GH-1055) Fix for `--random-fully`

Issues have arisen with the --random-fully value on certain RedHat versions.
It seem's as if the logic put in around `--random` and `--random-fully` are no longer working.
This change should resolve the issue and tighten the logic around the `known_boolean` values.
puppetlabs/puppetlabs-firewall