Add copyright info to openlldp.rb.

Please feel free to add your copyright for the changes you have added.  Original file is here: https://github.com/razorsedge/puppet-openlldp/blob/develop/lib/facter/openlldp.rb and is under the Apache License, Version 2.0.
Added origin info for openlldp.rb file.
Merge pull request #1 from razorsedge/master

Added source attribution for openlldp.rb facts