Files converted:
- Integrate Identity with LDAP
- Use trusts
- Configure Identity service for token binding
- Caching layer
- Integrate assignment back end with LDAP
- Integrate Identity back end with LDAP
- Secure the Identity service connection to an LDAP back end
Change-Id: Ic51e1a677993eabaaa6316df61ec5517cfeb99a4
Implements: blueprint reorganise-user-guide