Update to six 1.10.0 in tests.
Update to six 1.10.0 in tests.

django/django-localflavor,infoxchange/django-localflavor,agustin380/django-localflavor,thor/django-localflavor,rsalmaso/django-localflavor,jieter/django-localflavor,maisim/django-localflavor