invalid image name with 2.x charts

Hello!,

I followed the procedure described in voltha-helm-charts/README.md to deploy voltha ensemble using helm charts.

After the ‘helm dependency build ./voltha’ step under Deploy VOLTHA section, I see InvalidImageName for voltha docker containers (ro_core, rw_core, voltha-api-server, voltha-cli and ofagent).

If I hard-code image versions to 2.0.0 as below, the deployment is successful. Any faced this problem and know how to fix this?

diff --git a/voltha/values.yaml b/voltha/values.yaml

index 5c8c9a7..a65b224 100644

— a/voltha/values.yaml

+++ b/voltha/values.yaml

@@ -20,7 +20,7 @@ private_kafka_cluster: true

1. Default overrides

defaults:

   image_registry: ""

-  image_tag: '{{ .Chart.AppVersion }}'

+  image_tag: 2.0.0

   image_org: "voltha/"

   image_pullPolicy: "Always"

   rw_core: