private static Predicate<ServiceInfo> isLogserver() {
        return serviceInfo -> serviceInfo.getServiceType().equalsIgnoreCase("logserver");
    }
Finds all hosts we want to fetch metrics for, generates the appropriate URIs
and returns the generated MetricsResponse.

@author olaa
configserver/src/main/java/com/yahoo/vespa/config/server/metrics/DeploymentMetricsRetriever.java