Update etc and Kafka chart versions in Volta infra chart

Getting exception in Voltha build jobs:
19:26:49 Getting updates for unmanaged Helm repositories...
19:26:49 ...Successfully got an update from the "https://helm.elastic.co" chart repository
19:26:49 ...Successfully got an update from the "https://helm.elastic.co" chart repository
19:26:49 ...Successfully got an update from the "https://kiwigrid.github.io" chart repository
19:26:49 ...Successfully got an update from the "https://charts.bitnami.com/bitnami" chart repository
19:26:49 ...Successfully got an update from the "https://charts.bitnami.com/bitnami" chart repository
19:26:55 ...Successfully got an update from the "https://charts.onosproject.org" chart repository
19:26:55 Hang tight while we grab the latest from your chart repositories...
19:26:56 ...Successfully got an update from the "onf" chart repository
19:26:56 Update Complete. ⎈Happy Helming!⎈
*19:26:58 Error: can't get a valid version for repositories etcd, kafka. Try changing the version constraint in Chart.yaml
*19:26:58 [Pipeline] echo
19:26:58 ** vars/volthaInfraDeploy.groovy::main: EXCEPTION hudson.AbortException: script returned exit code 1

Current Versions of charts:

• name: etcd
  repository: https://charts.bitnami.com/bitnami
  version: 6.13.9
  condition: etcd.enabled
• name: kafka
  repository: https://charts.bitnami.com/bitnami
  version: 14.9.0