unable to transmitt a Calendar in AuthorizeConfirmation message about java-oca-ocpp HOT 4 CLOSED

@Test
    public void unpackPayload_aCalendarPayload_returnsTestModelWithACalendar() throws Exception {
        // Given
        String aCalendar = "2016-04-28T07:16:11.988Z";
        String payload = "{\"calendarTest\":\"%s\"}";

        Calendar someDate = new Calendar.Builder().setDate(2016,03,28)
                .setTimeOfDay(07,16,11,988).setTimeZone(TimeZone.getTimeZone("GMT+00:00")).build();

        // When
        TestModel model = communicator.unpackPayload(String.format(payload, aCalendar), TestModel.class);

        // Then
        assertThat(model.getCalendarTest().compareTo(someDate), is(0));
    }