Setting imagePullPolicy to Always

Change-Id: Iada3d3656a672154da6641c3ee55b57ec4c28fcb
diff --git a/voltha/values.yaml b/voltha/values.yaml
index a666ea5..f148577 100644
--- a/voltha/values.yaml
+++ b/voltha/values.yaml
@@ -15,7 +15,7 @@
 pull_docker_registry:
 k8s_docker_registry: 'k8s.gcr.io/'
 
-imagePullPolicy: IfNotPresent
+imagePullPolicy: Always
 
 replicas:
   vcore: 1