Add puppet-openstack project puppet-openstack_extras

Adds openstack_extras. This module is intended to serve as a
storage place for classes that use the core set of openstack
modules. Useful composition classes, utilies that provide ha
and monitoring functionality and so on.

Change-Id: I07d6721cc997eade17acb05b76f65893f8dfcc93
Merge "Add puppet-openstack project puppet-openstack_extras"