Updated openstack/openstack
Project: openstack/keystone  57afae1f7b7612169da575b69ac1e5c2b5028f48

Update the federation configuration docs for saml2

Since 'Re-engineered Federation' has merged, we should update the
configuration docs accordingly. We want to expose the mapped
class.

Change-Id: I8c53f7a3da4bdfb563f43cd0eefdf9d66fc57753