TypeError at /
process() missing 1 required positional argument: 'stream'

Related to https://github.com/jazzband/django-debug-toolbar/issues/856

The current required Django version is 1.9.5 which doesn't support
Python 3.3 which causes the Python 3.3 deployment to fail while
using django-ex git repo.

The Django version is modified to use 1.8.x only to include Python
3.3 support.

Signed-off-by: Vu Dinh <vdinh@redhat.com>