Split up LDAP tests a bit and use unittest.TestCase
Split up LDAP tests a bit and use unittest.TestCase

There's no need to use Django's TestCase here since we're not
interacting with Django models and such. In fact, I would say that using
Django's TestCase is incorrect, because the LDAP functionality is
essentially orthogonal to Django.

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