Fixing _meta access test for python3

Author: carlio

test/input/func_noerror_proteted_meta_access.py

@@ -6,6 +6,7 @@
 and https://docs.djangoproject.com/en/1.9/ref/models/meta/)
 """
 #  pylint: disable=C0111,W5101,W5103
+from __future__ import print_function
 from django.db import models