[1.7.x] Use smart_text rather than naive forcing-to-unicode for state reading

from django.db.models.fields.proxy import OrderWrt

from django.conf import settings

from django.utils import six

from django.utils.encoding import force_text

from django.utils.encoding import force_text, smart_text

from django.utils.module_loading import import_string

    @classmethod

    def force_text_recursive(cls, value):

        if isinstance(value, six.string_types):

            return six.text_type(value)

            return smart_text(value)

        elif isinstance(value, list):

            return [cls.force_text_recursive(x) for x in value]

        elif isinstance(value, tuple):