Installation Guide XML IDs change

Changing the XML IDs of several chapters in the installation
guide for consistency, and to match the section title, which
follows conventions. Minor subjective edits also included.

Change-Id: Id33aa27ef2027ac13f129c3bae150492b4bbfa13
backport:none
Implements: blueprint installation-guide-improvements
Co-Authored-By: Matt Kassawara <mkassawara@gmail.com>
Merge "Installation Guide XML IDs change"