Add voltha-helm-charts repo

Change-Id: If3802bfed4ce195c27897a0172874bb6b572abb9
diff --git a/default.xml b/default.xml
index 409382b..954521c 100644
--- a/default.xml
+++ b/default.xml
@@ -38,5 +38,5 @@
   <project path="voltha-simolt-adapter" name="voltha-simolt-adapter"/>
   <project path="voltha-simonu-adapter" name="voltha-simonu-adapter"/>
   <project path="voltha-api-server" name="voltha-api-server"/>
-
+  <project path="voltha-helm-charts" name="voltha-helm-charts"/>
 </manifest>