* If no token found in the cookie redirect to astakos login
with next parameter pointing to the request path
* Extend the list of the valid response statuses
* If no expected response status is received, pass to the raised
exception the response status instead of the whole response.

Conflicts:
	snf-pithos-app/pithos/api/settings.py
	snf-pithos-app/pithos/api/util.py