Deployment Guide Update

[wombelix]

Deployment Guide updated by following https://aws-ia-us-west-2.s3.us-west-2.amazonaws.com/docs/content/index.html#/.

• Unused / outdated files (images and adoc) removed.
• New architecture diagram added (png and pptx)
• Diagram's bulleted list created (part of architecture.adoc)
• Overview adjusted to make clear what will be deployed and the benefits of the partner solution.

[wombelix]

Superseded by https://github.com/aws-ia/cfn-ps-red-hat-rhel-with-ha/pull/29