Fixed test_integration.BasicSOQLTest.test_only_fields for Django 1.8
Fixed test_integration.BasicSOQLTest.test_only_fields for Django 1.8

This was an ugly bug with Django 1.8 caused by merge in the commit
v0.6 with result of a few hundred repeated queries and
"RuntimeError: maximum recursion depth exceeded".

philchristensen/django-salesforce,philchristensen/django-salesforce,django-salesforce/django-salesforce,django-salesforce/django-salesforce,chromakey/django-salesforce,chromakey/django-salesforce,chromakey/django-salesforce,philchristensen/django-salesforce,django-salesforce/django-salesforce,hynekcer/django-salesforce,hynekcer/django-salesforce,hynekcer/django-salesforce