Configuring ONOS-classic pullPolicy

Change-Id: I3bb7b63e5e15db9359e823b19ced40ead7676142
diff --git a/minimal-values.yaml b/minimal-values.yaml
index 1804096..944dd9e 100644
--- a/minimal-values.yaml
+++ b/minimal-values.yaml
@@ -23,6 +23,7 @@
 # this block and replace "<VALUE>" with "voltha-2.1".
 defaults:
   image_tag: master
+  image_pullPolicy: Always
 
 # OFAGENT IMPLEMENTATION
 # ----------------------