Fix bug in storing client information in a certain case.

There is a bug in storing client information derived from client_registration in conf.py.
Fix bug in storing provider information in a certain case.

There is a bug in storing provider information derived from provider_info in conf.py.
Merge pull request #17 from dajiaji/topic-oidc-example-rp

Fix bug in rp3 to store client/provider information derived from conf.py