Puppet 4.0.0 release

FYI.

http://docs.puppetlabs.com/puppet/4.0/reference/install_linux.html#install-a-release-package-to-enable-puppet-labs-package-repositories

The PL packaging has now changed over to the vendored/"all in one"
format. The package versions are completely decoupled from the puppet
version. Eg.,

http://yum.puppetlabs.com/el/7/PC1/x86_64/

-Josh

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