don't apply secret when using existing (#992)

Signed-off-by: Jonathan Cole <jonathan@mothership.com>

Co-authored-by: André Bauer <monotek@users.noreply.github.com>

charts/prometheus-postgres-exporter/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 appVersion: "0.9.0"
 description: A Helm chart for prometheus postgres-exporter
 name: prometheus-postgres-exporter
-version: 2.3.2
+version: 2.3.3
 home: https://github.com/prometheus-community/postgres_exporter
 sources:
 - https://github.com/prometheus-community/postgres_exporter

charts/prometheus-postgres-exporter/templates/secrets.yaml

@@ -1,4 +1,4 @@
-{{- if not .Values.config.datasource.passwordSecret -}}
+{{- if not (or .Values.config.datasource.passwordSecret .Values.config.datasourceSecret) -}}
 apiVersion: v1
 kind: Secret
 metadata: