Integrate django-scopes (#1319)

* Install django-scopes

* Fix tests.api

* Update tasks and cronjobs

* Fix remaining tests

* Remove unused import

* Fix tests after rebase

* Disable scopes for get_Events_with_any_permission

* Disable scopes for a management command

src/pretix/base/models/waitinglist.py

@@ -4,6 +4,7 @@ from django.core.exceptions import ValidationError
 from django.db import models, transaction
 from django.utils.timezone import now
 from django.utils.translation import pgettext_lazy, ugettext_lazy as _
+from django_scopes import ScopedManager
 
 from pretix.base.i18n import language
 from pretix.base.models import Voucher
@@ -67,6 +68,8 @@ class WaitingListEntry(LoggedModel):
     )
     priority = models.IntegerField(default=0)
 
+    objects = ScopedManager(organizer='event__organizer')
+
     class Meta:
         verbose_name = _("Waiting list entry")
         verbose_name_plural = _("Waiting list entries")