Add `update_session_auth_hash` to `customer.ChangePasswordView`
Add `update_session_auth_hash` to `customer.ChangePasswordView`

This is required in Django 1.9, see
https://docs.djangoproject.com/en/1.8/topics/auth/default/#session-invalidation-on-password-change

michaelkuty/django-oscar,okfish/django-oscar,ka7eh/django-oscar,eddiep1101/django-oscar,WillisXChen/django-oscar,ka7eh/django-oscar,solarissmoke/django-oscar,spartonia/django-oscar,sonofatailor/django-oscar,WillisXChen/django-oscar,ka7eh/django-oscar,john-parton/django-oscar,anentropic/django-oscar,WillisXChen/django-oscar,john-parton/django-oscar,sasha0/django-oscar,django-oscar/django-oscar,sonofatailor/django-oscar,john-parton/django-oscar,taedori81/django-oscar,django-oscar/django-oscar,WillisXChen/django-oscar,spartonia/django-oscar,okfish/django-oscar,itbabu/django-oscar,itbabu/django-oscar,itbabu/django-oscar,WillisXChen/django-oscar,michaelkuty/django-oscar,sonofatailor/django-oscar,WillisXChen/django-oscar,eddiep1101/django-oscar,michaelkuty/django-oscar,taedori81/django-oscar,spartonia/django-oscar,django-oscar/django-oscar,solarissmoke/django-oscar,spartonia/django-oscar,sasha0/django-oscar,django-oscar/django-oscar,anentropic/django-oscar,michaelkuty/django-oscar,ka7eh/django-oscar,eddiep1101/django-oscar,solarissmoke/django-oscar,okfish/django-oscar,sonofatailor/django-oscar,okfish/django-oscar,sasha0/django-oscar,sasha0/django-oscar,anentropic/django-oscar,taedori81/django-oscar,solarissmoke/django-oscar,itbabu/django-oscar,anentropic/django-oscar,taedori81/django-oscar,john-parton/django-oscar,eddiep1101/django-oscar