Oleg Kuznetsov

Test case: ```java @Test public void test(){ DefaultMessagePackMapper mapper = DefaultMessagePackMapperFactory.getInstance().defaultComplexTypesMapper(); Map expected = new HashMap(); expected.put((long) (Short.MAX_VALUE + 1), "test"); expected.put((long) (Short.MAX_VALUE + 2), "test"); Map actual = mapper.fromValue(mapper.toValue(expected));...