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

Change-Id: I6dc4bd70fcaf230d019dda871c2d8c4cfb92c7e7
diff --git a/xos-core/Chart.yaml b/xos-core/Chart.yaml
index 350aa64..d47d9c1 100644
--- a/xos-core/Chart.yaml
+++ b/xos-core/Chart.yaml
@@ -14,4 +14,12 @@
 # limitations under the License.
 
 name: xos-core
-version: 2.1.0-dev
+description: XOS - An Extensible Cloud Operating System
+icon: https://guide.opencord.org/logos/xos.svg
+
+version: 2.1.15
+
+# appVersion is of the xos-core and xos-chameleon containers.
+# xos-tosca and xos-api-tester are versioned in values.yaml
+appVersion: 2.1.15
+