This adds the puppet5 pools for puppetlabs apt mirror.
We need these two pools to get latest puppet5 versions
on Debian and Ubuntu:
* http://apt.puppetlabs.com/pool/xenial/puppet5/
* http://apt.puppetlabs.com/pool/stretch/puppet5/
The yum puppetlabs mirror is correct and after this fix
we can properly use the latest version available in CI.
Change-Id: Ic5f7a20bcc8181f1dc55dedfaa60c622defe9c43
d7b35e66af