[1.5.x] Fixed httpwrappers tests under hash randomization
[1.5.x] Fixed httpwrappers tests under hash randomization

Backport of 195bc37 from master

ccn-2m/django,ccn-2m/django,alx-eu/django,hasadna/django,imtapps/django-imt-fork,bliti/django-nonrel-1.5,ccn-2m/django,hasadna/django,alx-eu/django,bliti/django-nonrel-1.5,hasadna/django,ccn-2m/django,imtapps/django-imt-fork,bliti/django-nonrel-1.5,alx-eu/django,imtapps/django-imt-fork,alx-eu/django