🐛 use meter for counts instead of Counter

dropwizard metrics Meter is mapped to statsd's Counter.
IF we use dropwizard Counter then the metric will endup as a gauge in Datadog.
Reference coursera/metrics-datadog#45

The referenced issue also mentioned a version downgrade for metrics-datadog. I tried it locally and the version didn't seem to make a difference.

src/main/java/com/zendesk/maxwell/producer/AbstractAsyncProducer.java

@@ -42,7 +42,7 @@ public void markCompleted() {
 					messageLatencyTimer.update(Math.max(0L, age - 500L), TimeUnit.MILLISECONDS);
 
 					if (age > config.metricsAgeSlo) {
-						messageLatencySloViolationCount.inc();
+						messageLatencySloViolationCount.mark();
 					}
 				}
 			}

src/main/java/com/zendesk/maxwell/producer/AbstractProducer.java

@@ -19,7 +19,7 @@ public abstract class AbstractProducer {
 	protected final Meter failedMessageMeter;
 	protected final Timer messagePublishTimer;
 	protected final Timer messageLatencyTimer;
-	protected final Counter messageLatencySloViolationCount;
+	protected final Meter messageLatencySloViolationCount;
 
 	public AbstractProducer(MaxwellContext context) {
 		this.context = context;
@@ -34,7 +34,7 @@ public AbstractProducer(MaxwellContext context) {
 		this.failedMessageMeter = metricRegistry.meter(metrics.metricName("messages", "failed", "meter"));
 		this.messagePublishTimer = metricRegistry.timer(metrics.metricName("message", "publish", "time"));
 		this.messageLatencyTimer = metricRegistry.timer(metrics.metricName("message", "publish", "age"));
-		this.messageLatencySloViolationCount = metricRegistry.counter(metrics.metricName("message", "publish", "age", "slo_violation"));
+		this.messageLatencySloViolationCount = metricRegistry.meter(metrics.metricName("message", "publish", "age", "slo_violation", "meter"));
 	}
 
 	abstract public void push(RowMap r) throws Exception;