private ConsumersConfig consumersConfig() {
        return new ConsumersConfig.Builder()
                .consumer(createConsumer(vespaMetricsConsumerId, "foo.count", "foo_count"))
                .consumer(createConsumer(CUSTOM_CONSUMER_ID, "foo.count", "foo.count"))
                .build();
    }
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