Long values are not sent correctly with PubSub #686

...
/**
   * This is the entry point of the publisher app example.
   * @param args Args, unused.
   * @throws Exception A startup Exception.
   */
  public static void main(String[] args) throws Exception {
    try (DaprClient client = new DaprClientBuilder().build()) {
      for (int i = 0; i < NUM_MESSAGES; i++) {
        String message = String.format("This is message #%d", i);
        //Publishing messages
        client.publishEvent(
            PUBSUB_NAME,
            TOPIC_NAME,
            new WithLong(590518626939830271L),
            singletonMap(Metadata.TTL_IN_SECONDS, MESSAGE_TTL_IN_SECONDS)).block();
        System.out.println("Published message: " + message);

        try {
          Thread.sleep((long) (1000 * Math.random()));
        } catch (InterruptedException e) {
          e.printStackTrace();
          Thread.currentThread().interrupt();
          return;
        }
      }

      // This is an example, so for simplicity we are just exiting here.
      // Normally a dapr app would be a web service and not exit main.
      System.out.println("Done.");
    }
  }

package io.dapr.examples.pubsub.http;

public class WithLong {
  public Long value;

  public WithLong(Long value) {
    this.value = value;
  }

  public WithLong() {

  }


}

 ...
  /**
   * Handles a registered publish endpoint on this app.
   * @param cloudEvent The cloud event received.
   * @return A message containing the time.
   */
  @Topic(name = "testingtopic", pubsubName = "${myAppProperty:messagebus}")
  @PostMapping(path = "/testingtopic")
  public Mono<Void> handleMessage(@RequestBody(required = false) CloudEvent<WithLong> cloudEvent) {
    return Mono.fromRunnable(() -> {
      try {
        System.out.println("Subscriber got: " + cloudEvent.getData());
        System.out.println("Subscriber got: " + cloudEvent.getData().value);
      } catch (Exception e) {
        throw new RuntimeException(e);
      }
    });
  }
...

INFO[0004] dapr initialized. Status: Running. Init Elapsed 4536.042ms  app_id=subscriber instance=MacBook-Pro-von-Yoav.local scope=dapr.runtime type=log ver=1.6.0
== APP == Subscriber got: io.dapr.examples.pubsub.http.WithLong@644c09e5
== APP == Subscriber got: 590518626939830300
== APP == Subscriber got: io.dapr.examples.pubsub.http.WithLong@1a0d2d33
== APP == Subscriber got: 590518626939830300
== APP == Subscriber got: io.dapr.examples.pubsub.http.WithLong@932cc54
== APP == Subscriber got: 590518626939830300
== APP == Subscriber got: io.dapr.examples.pubsub.http.WithLong@206ed09f
== APP == Subscriber got: 590518626939830300
== APP == Subscriber got: io.dapr.examples.pubsub.http.WithLong@1c216f73
== APP == Subscriber got: 590518626939830300
== APP == Subscriber got: io.dapr.examples.pubsub.http.WithLong@7b64ed98
== APP == Subscriber got: 590518626939830300
== APP == Subscriber got: io.dapr.examples.pubsub.http.WithLong@4ef7c13c
== APP == Subscriber got: 590518626939830300
== APP == Subscriber got: io.dapr.examples.pubsub.http.WithLong@793a10ba
== APP == Subscriber got: 590518626939830300
== APP == Subscriber got: io.dapr.examples.pubsub.http.WithLong@178d181a
== APP == Subscriber got: 590518626939830300
== APP == Subscriber got: io.dapr.examples.pubsub.http.WithLong@6920325d
== APP == Subscriber got: 590518626939830300