- What is the nature and description of the request? 
As an admin I require the ability to specify multiple identityProviders so that users from X and users from Y are able to authenticate with my cluster.

- Why does the customer need this? (List the business requirements here) 
They might need to allow users from different organizations (and therefore different base authentication methods) to log into the cluster

- How would the customer like to achieve this? (List the functional requirements here) 
Specify multiple identityProviders in the master config file

- For each functional requirement listed, specify how Red Hat and the customer can test to confirm the requirement is successfully implemented.
Add and authenticate from multiple sources

- Is there already an existing RFE upstream or in Red Hat Bugzilla?
https://trello.com/c/VXoXBsbK/605-allow-multiple-web-login-providers
https://github.com/openshift/origin/pull/7039