[bitnami/postgresql] Fix slave' statefulset when persistence is disabled (#3527)

Signed-off-by: juan131 <juanariza@vmware.com>

bitnami/postgresql/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: postgresql
-version: 9.3.2
+version: 9.3.3
 appVersion: 11.9.0
 description: Chart for PostgreSQL, an object-relational database management system (ORDBMS) with an emphasis on extensibility and on standards-compliance.
 keywords:

bitnami/postgresql/templates/statefulset-slaves.yaml

@@ -305,7 +305,7 @@ spec:
             medium: Memory
             sizeLimit: 1Gi
         {{- end }}
-        {{- if not .Values.persistence.enabled }}
+        {{- if or (not .Values.persistence.enabled) (not .Values.slave.persistence.enabled) }}
         - name: data
           emptyDir: {}
         {{- end }}