Setting imagePullPolicy to Always

Change-Id: Iada3d3656a672154da6641c3ee55b57ec4c28fcb
diff --git a/xos-services/vtn-service/values.yaml b/xos-services/vtn-service/values.yaml
index a0fb60e..857df1b 100644
--- a/xos-services/vtn-service/values.yaml
+++ b/xos-services/vtn-service/values.yaml
@@ -22,7 +22,7 @@
 nameOverride: ""
 fullnameOverride: ""
 
-imagePullPolicy: 'IfNotPresent'
+imagePullPolicy: 'Always'
 
 vtn_synchronizerImage: "xosproject/vtn-synchronizer:master"