Update python-django-babel in queens from fedora build
Update python-django-babel in queens from fedora build

It's needed to update python-django in https://review.rdoproject.org/r/#/c/11091/

In upper-constraints.txt it's set to django-babel===0.6.2.

Change-Id: Ic1e281c55341422faed8ace8307a9a65738fad8a

javierpena/rdoinfo,redhat-openstack/rdoinfo