Puppet: wire in tripleo::packages

Puppet: wire in tripleo::packages

This wires in use of a new puppet-tripleo class which
encapsulates the logic to enable/disable package
installation and upgrades.

By using the new class we can remove the global
Package provider declaration at the top of each
module.

Change-Id: I5c6e5fd8600031bd8fb6195649721607c560f9d5
Depends-on:  Ie8fbc344149bc8c9977e127de77636903607617a