Resolved RemovedInDjango20Warning deprecation warnings

netbox/ipam/models.py

@@ -3,10 +3,10 @@ from netaddr import IPNetwork, cidr_merge
 from django.conf import settings
 from django.contrib.contenttypes.fields import GenericRelation
 from django.core.exceptions import ValidationError
-from django.core.urlresolvers import reverse
 from django.core.validators import MaxValueValidator, MinValueValidator
 from django.db import models
 from django.db.models.expressions import RawSQL
+from django.urls import reverse
 from django.utils.encoding import python_2_unicode_compatible
 
 from dcim.models import Interface