Modeling Self Service, continued

## What are the schemas that are affected by the issue
https://github.com/adobe/xdm/blob/master/schemas/common/selfservice.schema.json

## What are examples of products that are impacted by the issue
CloudManager, Ethos, Self Service in general

This is a continuation of work done in scope of https://github.com/adobe/xdm/issues/27

Existing schema is not used yet.

Start by reading the prior discussion in issue #27 and the affected schemas/common/selfservice.schema.json file. Identify the unresolved modeling work for CloudManager, Ethos, and Self Service, then confirm the intended schema changes and how completion will be verified, since this issue does not define them.

Written by the indexing model from the issue text.