[CORD-3026] Unify the usage of imagePullPolicy in helm-charts

Change-Id: I6135a81060eeb7f2831ce9c7207339f92017c10e
diff --git a/voltha/templates/freeradius.yaml b/voltha/templates/freeradius.yaml
index 10a32c6..6436303 100644
--- a/voltha/templates/freeradius.yaml
+++ b/voltha/templates/freeradius.yaml
@@ -55,7 +55,8 @@
       serviceAccountName: {{ .Values.global.namespace }}-serviceaccount
       containers:
         - name: freeradius
-          image: {{ .Values.pull_docker_registry }}{{ .Values.images.freeradius.repository }}:{{ .Values.images.freeradius.tag }}
+          image: {{ .Values.freeradiusImage }}
+          imagePullPolicy: {{ .Values.imagePullPolicy }}
           env:
             - name: POD_IP
               valueFrom: