private static Service.Builder createService(ServiceId serviceId, String configId, int port) {
        return new Service.Builder()
                .name(serviceId.id)
                .configId(configId)
                .port(port)
                .dimension(new Service.Dimension.Builder().key("serviceDim").value("serviceDimValue"));
    }
Setup and shutdown of config and servers for integration-style unit tests.

@author hmusum
@author gjoranv
metrics-proxy/src/test/java/ai/vespa/metricsproxy/rpc/IntegrationTester.java