[stable/rabbitmq-ha] Only allow guest if it was enabled (#18795)

Signed-off-by: Ivan Kurnosov <zerkms@zerkms.com>

stable/rabbitmq-ha/Chart.yaml

@@ -1,7 +1,7 @@
 name: rabbitmq-ha
 apiVersion: v1
 appVersion: 3.8.0
-version: 1.36.1
+version: 1.36.2
 description: Highly available RabbitMQ cluster, the open source message broker
   software that implements the Advanced Message Queuing Protocol (AMQP).
 keywords:

stable/rabbitmq-ha/templates/configmap.yaml

@@ -73,9 +73,11 @@ data:
     cluster_formation.node_cleanup.only_log_warning = true
     cluster_partition_handling = {{ .Values.rabbitmqClusterPartitionHandling }}
 
+    {{- if eq .Values.rabbitmqUsername "guest" }}
     ## The default "guest" user is only permitted to access the server
     ## via a loopback interface (e.g. localhost)
     loopback_users.guest = false
+    {{- end }}
 
     management.load_definitions = /etc/definitions/definitions.json