Only pass POSTGRESQL_DATABASE if it is set (#9786)

Signed-off-by: Gabriel Nicolas Avellaneda <avellaneda.gabriel@gmail.com>

Bump chart version

Signed-off-by: Gabriel Nicolas Avellaneda <avellaneda.gabriel@gmail.com>

stable/postgresql/Chart.yaml

@@ -1,5 +1,5 @@
 name: postgresql
-version: 2.7.9
+version: 2.7.10
 appVersion: 10.6.0
 description: Chart for PostgreSQL, an object-relational database management system (ORDBMS) with an emphasis on extensibility and on standards-compliance.
 keywords:

stable/postgresql/templates/statefulset.yaml

@@ -110,8 +110,10 @@ spec:
               name: {{ template "postgresql.fullname" . }}
             {{- end }}  
               key: postgresql-password
+        {{- if .Values.postgresqlDatabase }}
         - name: POSTGRESQL_DATABASE
           value: {{ .Values.postgresqlDatabase | quote }}
+        {{- end }}
         - name: POD_IP
           valueFrom: { fieldRef: { fieldPath: status.podIP } }
 {{- if .Values.extraEnv }}