Fix get_inlines method being ignored

[pawnhearts]

No description provided.

[scottgigante]

@OskarPersson could you please merge this PR? It's been sitting here for almost a year now and would be a great addition to this package.

[OskarPersson]

@scottgigante I would like to see a test added first

[scottgigante]

I don't think anyone can write passing tests until #161 is merged.. anyhow I found https://django-nested-admin.readthedocs.io/en/latest/ which seems to solve my problems. Thanks

[pawnhearts]

There weren't much tests back when I made that PR(there was just one which just tested if admin site loads). The thing is parent classes all work via that get_inline interface(which can be redefined and I had it redefined in my project). Just like other similar things in django(get_queryset, get_serializer_class, etc).
It's so simple there aren't much to test. That changelist_view still works when this method is redefined? That this method returns value of inlines if it's not?

[OskarPersson]

You're right. This is now merged :)