Fix bug#1220351 Create Cloud Administrator Guide

Create a new guide from the remains of Compute, Object Storage, Block Storage, and Networking Administration Guides left over from removal of install and config specific info.

Remove gerunds from the headings based on the OS Docs Style, correct links refs, insert chapter and section tags.

Update pom file to reflect the appropriate disqus registration

Update section names for loose xi:include files

Move figures to Common folder and update xrefs

Author: Nermina Miller

Change-Id: I21cf53e26c25d75ad1b75ec7449e8e1a7e4b9bb2
Merge "Fix bug#1220351 Create Cloud Administrator Guide"