[manual] Authenticate using a user_profile as request.user.

When this is deployed to staging, we need to run

./manage.py logout_all_users --realm=humbughq.com

When this is deployed to prod, we need to run

./manage.py logout_all_users

(imported from commit d6c6ea4b1c347f3d9122742db23c7b67767a7349)

zephyr/forms.py

@@ -52,6 +52,6 @@ class HomepageForm(forms.Form):
 
 class LoggingSetPasswordForm(SetPasswordForm):
     def save(self, commit=True):
-        do_change_password(self.user.userprofile, self.cleaned_data['new_password1'],
+        do_change_password(self.user, self.cleaned_data['new_password1'],
                            log=True, commit=commit)
         return self.user