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

Change-Id: I6dc4bd70fcaf230d019dda871c2d8c4cfb92c7e7
diff --git a/xos-services/exampleservice/values.yaml b/xos-services/exampleservice/values.yaml
index 3ae9782..6fea766 100644
--- a/xos-services/exampleservice/values.yaml
+++ b/xos-services/exampleservice/values.yaml
@@ -22,9 +22,10 @@
 nameOverride: ""
 fullnameOverride: ""
 
-imagePullPolicy: 'Always'
-
-exampleservice_synchronizerImage: "xosproject/exampleservice-synchronizer:{{ .Chart.Version }}"
+image:
+  repository: "xosproject/exampleservice-synchronizer"
+  tag: '{{ .Chart.AppVersion }}'
+  pullPolicy: 'Always'
 
 xosAdminUser: "admin@opencord.org"
 xosAdminPassword: "letmein"
@@ -46,3 +47,4 @@
 global:
   proxySshEnabled: true
   proxySshUser: "root"
+  registry: ''