added check to make sure attribute exists in settings.py
added check to make sure attribute exists in settings.py

grendel513/django-DefectDojo,rackerlabs/django-DefectDojo,yan99uic/django-DefectDojo,grendel513/django-DefectDojo,OWASP/django-DefectDojo,OWASP/django-DefectDojo,grendel513/django-DefectDojo,rackerlabs/django-DefectDojo,OWASP/django-DefectDojo,OWASP/django-DefectDojo,yan99uic/django-DefectDojo,OWASP/django-DefectDojo,rackerlabs/django-DefectDojo,grendel513/django-DefectDojo,yan99uic/django-DefectDojo,yan99uic/django-DefectDojo,rackerlabs/django-DefectDojo