fix(recovery): Default recovery cluster server name

The `barmanObjectStore.serverName` for the recovery cluster was previously
not explicitly defaulting. This change ensures that if
`.Values.recovery.clusterName` is not provided, the `serverName` will
automatically fall back to the full name of the current cluster.

Signed-off-by: Enrique Hernández Bello <ehernandez@maarlab.com>

Author: ehbello

charts/cluster/templates/_external_clusters.tpl

@@ -12,7 +12,7 @@ externalClusters:
     {{- if eq (include "cluster.useBarmanCloudPlugin" .) "false" }}
   - name: objectStoreRecoveryCluster
     barmanObjectStore:
-      serverName: {{ .Values.recovery.clusterName }}
+      serverName: {{ .Values.recovery.clusterName | default (include "cluster.fullname" .) }}
       {{- $d := dict "chartFullname" (include "cluster.fullname" .) "scope" .Values.recovery "secretPrefix" "recovery" -}}
       {{- include "cluster.barmanObjectStoreConfig" $d | nindent 4 }}
     {{- else }}