Improve self-consistency of auth response examples

The goal of this change is not to introduce anything new, but rather to
clean up the documentation we already have.

- All auth examples are now valid, self-contained examples of potential
  responses
- Filled in all the "..." and "--value--" in examples with
  self-consistent ID's, etc
- Removed outer 'token' container on some examples
- Removed token ID values from some response bodies
- Removed the user's 'role_links' attribute from some examples, a relic from v2
- Replaced conflicting examples of 'catalog' attributes with a FIXME

Change-Id: Ia4e09cd9becb471ca6e0d11f222a970fcdad43dc
Merge "Improve self-consistency of auth response examples"