Allow for the postgresql checkImage to be specified.

@@ -51,7 +51,7 @@ spec:
         {{-   end }}
         {{-   if (.Values.checkDsConnection.enabled) }}
         - name: postgresql-check-connection
-          {{ include "moqui.image-helper" .Values.postgresql.image | nindent 10 }}
+          {{ include "moqui.image-helper" (coalesce .Values.postgresql.image .Values.checkImage) | nindent 10 }}
           env:
             - name: POSTGRES_HOST
               value: {{ include "moqui.entity_ds_host" . }}

@@ -25,6 +25,11 @@ postgresql:
     database: moqui
     username: moqui
     password: iuqom
+  checkImage:
+    pullPolicy: IfNotPresent
+    registry: null
+    repository: null
+    tag: latest
   jdbcImage:
     enabled: false
     pullPolicy: IfNotPresent