Invalid Recipient JSON serialization

[KaseiFR]

The JSON serialization of Recipient contains the field type two times, and is rejected by the OpsGenie API.

Here's an example:

  @Test
  public void test1() throws Exception {
    OpsGenieClient client = new OpsGenieClient();
    ObjectMapper om = client.alertV2().getApiClient().getObjectMapper();

    Recipient r = new Recipient().type(Recipient.TypeEnum.TEAM).id("voltron");

    String json = om.writeValueAsString(r);
    System.out.println(json);
    assert json.equals("{\"type\":\"Recipient\",\"type\":\"team\",\"id\":\"voltron\"}");
  }

I've tested it with an empty project importing only com.opsgenie.integration:sdk:2.11.2 and junit, so I don't think it comes from a Jackson version conflict.