Change django.core.urlresolvers imports

-- compatible with 1.11 --

bda/views.py

@@ -10,13 +10,13 @@ from django.conf import settings
 from django.contrib import messages
 from django.core import serializers
 from django.core.exceptions import NON_FIELD_ERRORS
-from django.core.urlresolvers import reverse
 from django.db import transaction
 from django.db.models import Count, Prefetch
 from django.forms.models import inlineformset_factory
 from django.http import HttpResponseBadRequest, HttpResponseRedirect, JsonResponse
 from django.shortcuts import get_object_or_404, render
 from django.template.defaultfilters import pluralize
+from django.urls import reverse
 from django.utils import formats, timezone
 from django.views.generic.list import ListView