fuel-upgrade: add versions yaml hook

OpenStack Patching was introduced in Fuel 5.1, so we need to install
centos-versions.yaml and ubuntu-versiosn.yaml for Fuel 5.0.

This files are required since it's a solution of making rollback feature
when we need to install more earlier packages.

Implements blueprint upgrade-to-5-1

Change-Id: I8c3c9d50882a2f2d8aa6d43dc409fa5de110fdc2
Closes-Bug: #1341500
Merge "fuel-upgrade: add versions yaml hook"