add missing import of IntegrityError

- Legacy-Id: 5605

ietf/secr/rolodex/views.py

@@ -1,5 +1,6 @@
 from django.contrib import messages
 from django.core.urlresolvers import reverse
+from django.db import IntegrityError
 from django.db.models import Q
 from django.forms.formsets import formset_factory
 from django.forms.models import inlineformset_factory, modelformset_factory