use segment.run instead of setTraceEntity

Author: mwunderl

src/main/java/scorekeep/MoveFactory.java

@@ -70,10 +70,11 @@ public Move newMove(String sessionId, String gameId, String userId, String moveT
       Entity segment = recorder.getTraceEntity();
       Thread comm = new Thread() {
         public void run() {
-          recorder.setTraceEntity(segment);
-          Subsegment subsegment = AWSXRay.beginSubsegment("## Send notification");
-          Sns.sendNotification("Scorekeep game completed", "Winner: " + userId);
-          AWSXRay.endSubsegment();
+          segment.run(() -> {
+            Subsegment subsegment = AWSXRay.beginSubsegment("## Send notification");
+            Sns.sendNotification("Scorekeep game completed", "Winner: " + userId);
+            AWSXRay.endSubsegment();
+          });
         }
       };
       comm.start();