use success response to find out identity, not request params
use success response to find out identity, not request params

This fixes the bug breaking delegated identity logins: the
openid.claimed_id parameter was missing, replaced with
openid1_claimed_id - a parameter specific to python-openid.

Instead of using request.GET.get('openid.claimed_id'), use
client.result.identity_url: since the python-openid library
probably knows best anyway!

nvbn/django-socialregistration