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

Change-Id: I7f3457882830de050d1357254fc5483faf91d03f
diff --git a/xos-profiles/att-workflow/Chart.yaml b/xos-profiles/att-workflow/Chart.yaml
index 242f5e6..b52fc30 100644
--- a/xos-profiles/att-workflow/Chart.yaml
+++ b/xos-profiles/att-workflow/Chart.yaml
@@ -15,7 +15,11 @@
 # limitations under the License.
 
 apiVersion: v1
-appVersion: "1.0"
-description: A Helm chart for XOS's "att-workflow" profile
 name: att-workflow
-version: 0.1.0
+description: A Helm chart for XOS's "att-workflow" profile
+icon: https://guide.opencord.org/logos/cord.svg
+version: 1.0.0
+
+# xosproject/tosca-loader version
+appVersion: 1.1.3
+