Havana Updates to the Glance Cookbook

This PR updates various things throughout the cookbook. 
The primary reason for updating this is to resolve issue https://github.com/rcbops/chef-cookbooks/issues/649.
In the PR I have also cleaned up the general glance configuration files as well as update the paste.ini files to the spec being used in Upstream Havana. 

The general conf files have also been updated so that they are not full of unused variables.

The images in the default attributes have also been updated to the tune that NO images will be uploaded by default. I have also fixed the fedora image upload URL to be the correct Image URL. 

While resolving issue #649 I also found that while we were packaging the cache and scrubber config files we were not laying them down. This has also been resolved.