XOS/NEM charts, use a global registry var, split docker image name/tag/pullPolicy

Change-Id: I7f3457882830de050d1357254fc5483faf91d03f
diff --git a/xos-tools/xossh/Chart.yaml b/xos-tools/xossh/Chart.yaml
index 22858d3..814a6bb 100644
--- a/xos-tools/xossh/Chart.yaml
+++ b/xos-tools/xossh/Chart.yaml
@@ -15,4 +15,8 @@
 
 name: xossh
 description: A Helm chart for xossh, the XOS command line shell
-version: 2.1.0-dev
+icon: https://guide.opencord.org/logos/xos.svg
+version: 2.1.15
+
+# Runs the xosproject/xos-client container
+appVersion: 2.1.15