The KafkaTopic is invalid: DNS-1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character

Issue

• Editing the configuration of the kafka topic created by Debezium like admin.MarketPlace.PurchaseHistory fails with the following error:

  $ cat <<EOF | oc apply -f -
  apiVersion: kafka.strimzi.io/v1beta1
  kind: KafkaTopic
  metadata:
    name: admin.MarketPlace.PurchaseHistory
    labels:
      strimzi.io/cluster: broker
  spec:
    partitions: 3
    replicas: 1
    config:
      segment.bytes: 1073741824
  EOF
  The KafkaTopic "admin.MarketPlace.PurchaseHistory" is invalid: metadata.name: Invalid value: "admin.MarketPlace.PurchaseHistory": a DNS-1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')