[Bug] Ext Kafka in mycluster.yml throws error in schema verification

[verbunk]

Pulling a fresh copy of openwhisk-deploy-kube and specifying an external kafka per the configChoice.md,

kafka:
  external: true
  connect_string: kafka.server.com:9092

yields an error,

> helm upgrade --install dev . -f mycluster.yml

Release "dev" does not exist. Installing it now. Error: values don't meet the specifications of the schema(s) in the following chart(s): openwhisk:

• kafka: imageName is required
• kafka: imageTag is required
• kafka: imagePullPolicy is required
• kafka: replicaCount is required
• kafka: restartPolicy is required
• kafka: port is required
• kafka: Must validate all the schemas (allOf)

Removing the kafka block in values.schema.json allows the deployment to continue.

    "kafka": {
      "allOf": [
        { "$ref": "#/definitions/podspec" },
        { "properties": { "port": { "type": "integer", "minimum": 0 } }, "required": ["port"] }
      ]
    },