Should EventBusOptions.setClusterPublicPort(-1) fail ?

gistfile1.java

  @Test
  public void testEventBusOptions() {
    VertxOptions vertxOptions1 = new VertxOptions();
    JsonObject json = vertxOptions1.toJson();
    VertxOptions vertxOptions2 = new VertxOptions(json);
    assertEquals(json, vertxOptions2.toJson());
  }
  
  
  // ========================
  The above test fails with the message:
  
  testEventBusOptions(io.vertx.core.VertxOptionsTest)  Time elapsed: 0.338 sec  <<< ERROR!
java.lang.IllegalArgumentException: clusterPublicPort p must be in range 0 <= p <= 65535
	at io.vertx.core.eventbus.EventBusOptions.setClusterPublicPort(EventBusOptions.java:651)
	at io.vertx.core.eventbus.EventBusOptionsConverter.fromJson(EventBusOptionsConverter.java:55)
	at io.vertx.core.eventbus.EventBusOptions.<init>(EventBusOptions.java:165)
	at io.vertx.core.VertxOptionsConverter.fromJson(VertxOptionsConverter.java:45)
	at io.vertx.core.VertxOptions.<init>(VertxOptions.java:181)
	at io.vertx.core.VertxOptionsTest.testEventBusOptions(VertxOptionsTest.java:321)

`-1` is the default value for clusterPublicPort, why we cannot set the value to the default one ?

There is also a test that `setClusterPublicPort(-1)` should fail at: https://github.com/eclipse-vertx/vert.x/blob/4.2.5/src/test/java/io/vertx/core/VertxOptionsTest.java#L84-L89