VOL-2110 - update how default image tags are managed

- Sneak in a work around for helm 2.15

Change-Id: Iabe4fa98b5b4a574061f1fac7a876b3f1f05c398
diff --git a/voltha-adapter-openonu/Chart.yaml b/voltha-adapter-openonu/Chart.yaml
index a97bd27..3400c3a 100644
--- a/voltha-adapter-openonu/Chart.yaml
+++ b/voltha-adapter-openonu/Chart.yaml
@@ -17,5 +17,5 @@
 description: A Helm chart for Voltha OpenONU Adapter
 icon: https://guide.opencord.org/logos/cord.svg
 
-version: 2.1.2
+version: 2.1.3
 appVersion: 2.1.1