Rationalised the queues.

- the internal notify activites (send sms code, forgotten passwords etc) all not in a "notify" queue.
- deleted all unused queues

app/invite/rest.py

@@ -44,7 +44,7 @@ def create_invited_user(service_id):
         str(uuid.uuid4()),
         encryption.encrypt(message),
         datetime.utcnow().strftime(DATETIME_FORMAT)
-    ), queue="email-invited-user")
+    ), queue="notify")
 
     return jsonify(data=invited_user_schema.dump(invited_user).data), 201