Add namespace in default VaultAuth spec only if value is not nil in values.yaml

When deploying the chart with argocd in serversideapply mode, a nil value for namespace in default VaultAuth spec is rejected

Author: alexdga

chart/templates/default-vault-auth-method.yaml

@@ -15,7 +15,9 @@ metadata:
     app.kubernetes.io/component: controller-manager
   {{- include "vso.chart.labels" . | nindent 4 }}
 spec:
+  {{- if .Values.defaultAuthMethod.namespace }}
   namespace: {{ .Values.defaultAuthMethod.namespace }}
+  {{- end }}
   {{- if .Values.defaultAuthMethod.allowedNamespaces }}
   allowedNamespaces:
   {{- toYaml .Values.defaultAuthMethod.allowedNamespaces | nindent 4 }}