Fix the missing "-cert" suffix when applying SSL certificates in rabbitmq-ha chart (#6119)

* Fix the missing "-cert" suffix in `rabbitmq-ha` chart.

* Bump chart version to 1.6.1

stable/rabbitmq-ha/Chart.yaml

@@ -1,7 +1,7 @@
 name: rabbitmq-ha
 apiVersion: v1
 appVersion: 3.7.4
-version: 1.6.0
+version: 1.6.1
 description: Highly available RabbitMQ cluster, the open source message broker
   software that implements the Advanced Message Queuing Protocol (AMQP).
 keywords:

stable/rabbitmq-ha/templates/_helpers.tpl

@@ -46,5 +46,5 @@ Generate chart secret name
 Generate chart ssl secret name
 */}}
 {{- define "rabbitmq-ha.certSecretName" -}}
-{{ default (include "rabbitmq-ha.fullname" .) .Values.rabbitmqCert.existingSecret }}
+{{ default (print (include "rabbitmq-ha.fullname" .) "-cert") .Values.rabbitmqCert.existingSecret }}
 {{- end -}}