Implements #81 - webhook event backend (#1640)

* merge branch develop

* bugfix, signals for virtualization's class wasn't correctly defined

* updated webhooks for 2.4 and cleanup

* updated docs to cover changes to supervisor config

* review changes and further cleanup

* updated redis connection settings

* cleanup settings

netbox/tenancy/models.py

@@ -25,6 +25,8 @@ class TenantGroup(models.Model):
 
     csv_headers = ['name', 'slug']
 
+    serializer = 'tenancy.api.serializers.TenantGroupSerializer'
+
     class Meta:
         ordering = ['name']
 
@@ -79,6 +81,8 @@ class Tenant(CreatedUpdatedModel, CustomFieldModel):
 
     csv_headers = ['name', 'slug', 'group', 'description', 'comments']
 
+    serializer = 'tenancy.api.serializers.TenantSerializer'
+
     class Meta:
         ordering = ['group', 'name']