Update StatsdSource.java (#63)

Add default actor name as required by ActorSource.java same as in ClientHttpSourceV1.java

Author: vjkoskela

src/main/java/com/arpnetworking/metrics/common/sources/StatsdSource.java

@@ -64,6 +64,11 @@ private StatsdSource(final Builder builder) {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(StatsdSource.class);
     private static final Parser<List<Record>, ByteBuffer> PARSER = new StatsdToRecordParser();
+    
+    /**
+     * Name of the actor created to receive the Statsd datagrams.
+     */
+    public static final String ACTOR_NAME = "statsd";
 
     /**
      * Internal actor to process requests.
@@ -161,6 +166,7 @@ public static final class Builder extends ActorSource.Builder<Builder, StatsdSou
          */
         public Builder() {
             super(StatsdSource::new);
+            setActorName(ACTOR_NAME);
         }
 
         /**