Josh Cummings a4bd0d3923
OIDC Provider Configuration - ClientRegistrations
OIDC Provider Configuration is now being used to create more than just
ClientRegistration instances. Also, the endpoint is being addressed in
more contexts than just the client.

To that end, this refactors OidcConfigurationProvider in the config
project to ClientRegistrations in the oauth2-client project.

Fixes: gh-5647
2018-08-14 13:26:46 -06:00
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