adding imagePullSecret to freeradius template

This will allow pulling the image from a secure repository.

Change-Id: I43c85e5fa2888b92bf052ec3cb1b3987a0b5b90a
diff --git a/freeradius/values.yaml b/freeradius/values.yaml
index 9608a23..ca30d34 100644
--- a/freeradius/values.yaml
+++ b/freeradius/values.yaml
@@ -26,3 +26,6 @@
     repository: "freeradius/freeradius-server"
     tag: "{{ .Chart.AppVersion }}"
     pullPolicy: "{{ .Values.defaults.image_pullPolicy }}"
+#     pullSecrets:
+#     - name: regcred
+