Now that most of the operator docs are consolidated into the admin
guide, it is huge and hard to find things. This patch breaks the guide
into groups to make it a little easier to navigate:
1. Getting started: basics of keystone and initializing a deployment.
2. Configuration: not a replacement for the main config docs but a
grouping of all discussions on the various config options.
3. Operations: maintenance workflows like upgrading and cleanups
4. Tokens: an important part of keystone
5. RBAC: gets a section to itself
6. Advanced keystone features: grouping of lesser-known/lesser-used,
not-required features.
7. Authentication mechanisms: various auth methods besides password,
including the federation guide
Change-Id: I9039b7023d843349154d28ee0ee2c7b9a9eb97ab
Some of the admin guide pages were prefixed with "identity-" because
they came from the centralized install guide or operators guide or
security guide or somewhere else. We don't need the prefix, everything
in keystone is identity. Remove the prefix from the affected pages so
that everything is consistent.
Change-Id: Icd172a39fe720472f1fb15395178f90282696ac9