Ignore invalid versions in the forge, ie. 0.5.0-rc1

Instead of failing completely

For instance for the apache module 
http://forge.puppetlabs.com/puppetlabs/apache/0.5.0-rc1

Pushed as librarian-puppet-maestrodev 0.9.7.2 from 
https://github.com/maestrodev/librarian-puppet/tree/maestrodev
https://rubygems.org/gems/librarian-puppet-maestrodev