Log Message:
py-django: updated to 1.11.7

1.11.7:
Bugfixes
* Prevented cache.get_or_set() from caching None if the default argument is a \ 
callable that returns None.
* Fixed the Basque DATE_FORMAT string.
* Made QuerySet.reverse() affect nulls_first and nulls_last.
* Fixed unquoted table names in Subquery SQL when using OuterRef