This introduces a new keystone-manage command called 'doctor' which
attempts to diagnose and report on various ill-advised configurations
and deployment states.
The number of checks we could perform is basically endless, so this is
just a random sampling of checks to get the ball rolling. The idea is
that as new features are introduced, as default configurations change,
as we have new recommendations to make to deployers, etc, we can
implement new checks in keystone-manage doctor and communicate our
concerns directly to those operated affected deployments.
Change-Id: Ib6660c1a885c439ca03357870628b2ea52e39e9d
Implements: bp keystone-manage-doctor
059f35302d