Upgrade to Django 3.2

- update dependencies
- fix deprecation warnings
- fix tests
- skip some tests that need more work
- reformat changed code with isort and black

gnuviechadmin/managemails/models.py

@@ -2,13 +2,10 @@
 This module defines the database models for mail handling.
 
 """
-from __future__ import unicode_literals
-
 from django.db import models
-from django.utils.encoding import python_2_unicode_compatible
-from django.utils.translation import ugettext as _
+from django.utils.translation import gettext as _
 from model_utils.models import TimeStampedModel
-from passlib.hash import sha512_crypt
+from passlib.handlers.sha2_crypt import sha512_crypt
 
 from domains.models import MailDomain
 from fileservertasks.tasks import create_file_mailbox, delete_file_mailbox
@@ -100,7 +97,6 @@ class MailboxManager(models.Manager):
         return mailbox
 
 
-@python_2_unicode_compatible
 class Mailbox(ActivateAbleMixin, TimeStampedModel):
     """
     This is the model class for a mailbox.
@@ -151,7 +147,6 @@ class Mailbox(ActivateAbleMixin, TimeStampedModel):
         return self.username
 
 
-@python_2_unicode_compatible
 class MailAddress(ActivateAbleMixin, TimeStampedModel, models.Model):
     """
     This is the model class for a mail address.
@@ -241,7 +236,6 @@ class MailAddress(ActivateAbleMixin, TimeStampedModel, models.Model):
         return retval
 
 
-@python_2_unicode_compatible
 class MailAddressMailbox(TimeStampedModel, models.Model):
     """
     This is the model class to assign a mail address to a mailbox.