Don't provide CONF to the AuthProtocol middleware

The conf value that is passed to the AuthProtocol middleware is a
dictionary that is expected to be passed from paste. They are overrides
of oslo.conf not the conf object itself. If we don't pass anything it
will use the standard CONF object.

Closes-Bug: #1398524
Change-Id: Ia53a90f9b632b54a79906f07610c7a1ae1c70218
Merge "Don't provide CONF to the AuthProtocol middleware"