Fix comment (installed with yum)
Specific fix for https://github.com/petems/vagrant-puppet-install/issues/6

Local issue #25

Turns out Puppet 2.7 packages are locked to Facter < 2.0.0, so we should specify installing Facter 1.7.4 as part of the install process :+1:
Fix Vagrantfile provisioning
Merge pull request #33 from petems/fix_GH6

Fix for Issues with Facter on Puppet 2.7