Improve IdP Specific WebSSO docs

[Lance Bragstad]

With the liberty-3 deadline fast approaching, the following documentation patch was merged with some outstanding comments.

https://review.openstack.org/#/c/218353/

The WebSSO docs should be overhauled to provide a better user experience.

[Steve Martinelli (stevemar)]

consider https://review.openstack.org/#/c/218353/ to close this bug too

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/218353
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=609518ff2b6bcec82df561858f63e31203603825
Submitter: Jenkins
Branch: master

commit 609518ff2b6bcec82df561858f63e31203603825
Author: Lance Bragstad <email address hidden>
Date: Fri Aug 28 15:25:31 2015 +0000

    Add documentation for configuring IdP WebSSO

    We recently added a new federation call to Keystone that will allow federated
    authentication flows for a specific Identity Provider. This commit adds
    documentation around configuring httpd modules for the newly added call and
    horizon configuration.

    Co-Authored-By: Lin Hua Cheng <email address hidden>

    Change-Id: Id334e979c951387b1d70da70fc5d4939a6e7d6a6
    related: bp federation-idp-websso
    Closes-Bug: 1491910
    Related-Bug: 1491916

[Morgan Fainberg (mdrnstm)]

Moving to closed as the duplicate bug was closed