Consolidate barbican_integration_enabled settings

barbican might be enabled in multiple openstack services
 * nova
 * glance
 * cinder

Instead of enabling it on cluster level, move this integration
to system. Use barbican_integration_enabled option for this.

Related-Prod: PROD-25026
Related-Prod: PROD-25025
Related-Prod: PROD-25023

(cherry picked from commit 1cc05dee1232165e5ee9f463302f8c43682de241)

Change-Id: Ifcb2c404d700232085ba983dbca3b41dcdaaa43e
diff --git a/nova/compute/single.yml b/nova/compute/single.yml
index 7ba6775..5921ff0 100644
--- a/nova/compute/single.yml
+++ b/nova/compute/single.yml
@@ -70,6 +70,8 @@
         tenant: service
         protocol: ${_param:cluster_internal_protocol}
         region: ${_param:openstack_region}
+      barbican:
+        enabled: ${_param:barbican_integration_enabled}
       message_queue:
         engine: rabbitmq
         host: ${_param:control_address}