test: fix permissions for note tests

program/tests/__init__.py

 import datetime
 
-from django.contrib.auth.models import User
+from django.contrib.auth.models import Permission, User
 from django.utils.text import slugify
 from django.utils.timezone import now
 from program.models import Note, RRule, Schedule, Show, TimeSlot
@@ -31,6 +31,8 @@ class UserMixin:
         self.user_common = User.objects.create_user(
             "herbert", "herbert@aura.radio", password="herbert"
         )
+        note_permissions = Permission.objects.filter(content_type__model="note")
+        self.user_common.user_permissions.add(*note_permissions)
 
 
 class ShowMixin:
@@ -78,14 +80,12 @@ class NoteMixin:
         _title = kwargs.get("title", f"a random note #{note_count}")
         kwargs["timeslot"] = timeslot
         kwargs["title"] = _title
-        kwargs.setdefault("slug", slugify(_title))
         return Note.objects.create(**kwargs)
 
     def _create_random_note_content(self, **kwargs):
         note_count = Note.objects.all().count()
         _title = kwargs.get("title", f"a random note #{note_count}")
         kwargs["title"] = _title
-        kwargs.setdefault("slug", slugify(_title))
         kwargs.setdefault("content", "some random content")
         kwargs.setdefault("contributor_ids", [])
         return kwargs