Change import of encoding.python_2_unicode_compatible
Change import of encoding.python_2_unicode_compatible

Due to deprecation[1], this decorator has to be imported
from six instead of Django

[1] https://docs.djangoproject.com/en/3.0/releases/3.0/#removed-private-python-2-compatibility-apis

release-engineering/kobo,release-engineering/kobo,release-engineering/kobo,release-engineering/kobo