Make importlib import compatible w/ Django>=1.8
Make importlib import compatible w/ Django>=1.8

For Django 1.8, this just squelches a DeprecationWarning. For 1.9, this
will stop an ImportError.

PSU-OIT-ARC/django-arcutils,mdj2/django-arcutils,wylee/django-arcutils,wylee/django-arcutils,mdj2/django-arcutils,PSU-OIT-ARC/django-arcutils