Support reverse() import change

private_storage/storage/files.py

@@ -2,10 +2,14 @@
 Django Storage interface, using the file system backend.
 """
 from django.core.files.storage import FileSystemStorage
-from django.core.urlresolvers import reverse_lazy
 from django.utils.deconstruct import deconstructible
 from django.utils.encoding import force_text
 
+try:
+    from django.urls import reverse_lazy  # Added in Django 1.10
+except ImportError:
+    from django.core.urlresolvers import reverse_lazy
+
 from private_storage import appconfig