fix iconv gripes from #2752

wagtail/tests/modeladmintest/forms.py

@@ -1,3 +1,5 @@
+from __future__ import absolute_import, unicode_literals
+
 from django import forms
 
 from .models import Publisher

wagtail/tests/modeladmintest/wagtail_hooks.py

@@ -4,8 +4,8 @@ from wagtail.contrib.modeladmin.options import ModelAdmin, ModelAdminGroup, mode
 from wagtail.contrib.modeladmin.views import CreateView
 from wagtail.tests.testapp.models import BusinessChild, EventPage, SingleEventPage
 
-from .models import Author, Book, Token, Publisher
 from .forms import PublisherModelAdminForm
+from .models import Author, Book, Publisher, Token
 
 
 class AuthorModelAdmin(ModelAdmin):