@Override
    public void setComponentRegistry(IComponentRegistry componentRegistry) {
    }
Prometheus scrape metrics.

Config:
<ul>
  <li>port - port for web-server to listen on for scrape requests</li>
</ul>

@author Marc Savy {@literal <msavy@redhat.com>}
gateway/engine/prometheus/src/main/java/io/apiman/gateway/engine/prometheus/PrometheusScrapeMetrics.java