Let Helm deploy service monitor for Kafka Lag Exporter based on Helm template

Closes #23 (closed) Yes Helm can create the Service Monitor, for this a Service Monitor Template is provided by the Kafka Lag-Exporter. This must be activated with enabled:true and the label appScope:titan-ccp must be set, then Helm will create a service monitor based on the template https://github.com/lightbend/kafka-lag-exporter/blob/master/charts/kafka-lag-exporter/templates/060-ServiceMonitor.yaml .