Fixes issue with existing gpg config
Fixes issue with existing gpg config

* New repo file has two GPG keys (Puppet + Puppetlabs)
* Installing RPM doesn't add this new config
* Add logic to move old config if it exists

Closes https://github.com/petems/puppet-install-shell/issues/81
fabiendelpierre/puppet-install-shell,petems/puppet-install-shell,fabiendelpierre/puppet-install-shell