For non-XOS charts, use a global registry var, split docker image name/tag/pullPolicy

Change-Id: Icffc569e2c152e0b413f4c7b7d9a546bd9a3ef58
diff --git a/mavenrepo/Chart.yaml b/mavenrepo/Chart.yaml
index c22a136..40351d4 100644
--- a/mavenrepo/Chart.yaml
+++ b/mavenrepo/Chart.yaml
@@ -1,3 +1,4 @@
+---
 # Copyright 2017-present Open Networking Foundation
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -13,4 +14,7 @@
 # limitations under the License.
 
 name: mavenrepo
+icon: https://guide.opencord.org/logos/cord.svg
 version: 1.0.0
+
+appVersion: 'latest'