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>