Fix test failure caused by 3149cdce

from django.conf import settings

from django.core.management.base import CommandError

from django.db import models, router

from django.db.migrations.loader import MigrationLoader

from django.utils.deprecation import RemovedInDjango19Warning

def check_for_migrations(app_config, connection):

    # Inner import to stop tests failing

    from django.db.migrations.loader import MigrationLoader

    loader = MigrationLoader(connection)

    if app_config.label in loader.migrated_apps:

        raise CommandError("App '%s' has migrations. Only the sqlmigrate and sqlflush commands can be used when an app has migrations." % app_config.label)