Add call to super()'s init in KafkaBootStep

gwcelery/kafka/bootsteps.py

@@ -20,6 +20,7 @@ class KafkaBootStep(bootsteps.ConsumerStep):
     """
 
     def __init__(self, parent, kafka=False, **kwargs):
+        super().__init__(parent, **kwargs)
         self.enabled = bool(kafka)
 
     def start(self, parent):