incomplete: Fix hessian2 serialized short, byte is converted to int bug (#1232)

[takeseem]

#1232
It is just supported Hessian2, imcomplete in hessian1.

Example: https://github.com/apache/incubator-dubbo/blob/3d4f2fcdbbc327c2dac872962f65b2f011c7d247/hessian-lite/src/test/java/com/alibaba/com/caucho/hessian/io/Hessian2StringShortTest.java#L47

if add hessian1 test, it will be fail:

    @Test
    public void serialize_string_byte_map_then_deserialize() throws Exception {

        Hessian2StringShortType stringShort = new Hessian2StringShortType();
        Map<String, Byte> stringByteMap = new HashMap<String, Byte>();
        stringByteMap.put("first", (byte)0);
        stringByteMap.put("last", (byte)60);
        stringShort.stringByteMap = stringByteMap;

        Hessian2StringShortType deserialize = baseHession2Serialize(stringShort);
        assertTrue(deserialize.stringByteMap != null);
        assertTrue(deserialize.stringByteMap.size() == 2);
        assertTrue(deserialize.stringByteMap.get("last") instanceof Byte);
        assertEquals(Byte.valueOf((byte)0), deserialize.stringByteMap.get("first"));
        assertEquals(Byte.valueOf((byte) 60), deserialize.stringByteMap.get("last"));

//add hessian1 test, it will be fail
        deserialize = baseHessionSerialize(stringShort);
        assertTrue(deserialize.stringByteMap != null);
        assertTrue(deserialize.stringByteMap.size() == 2);
        assertTrue(deserialize.stringByteMap.get("last") instanceof Byte);
        assertEquals(Byte.valueOf((byte)0), deserialize.stringByteMap.get("first"));
        assertEquals(Byte.valueOf((byte) 60), deserialize.stringByteMap.get("last"));
    }

so my fix push test fail: #1608 JavaDeserializer._constructor.newInstance([null, null]) NPE
old issue #210 dubbo调用报错HessianFieldException

[zonghaishang]

The hessian2 protocol has been used by default. Which scenario needs to use hessian1? Please tell me
which version you are using.

[takeseem]

dubbo作为一个严谨的框架，既然hessian1未废弃，就应当保持一致性，因为其他人可能在使用。

这是我第3次看到dubbo的master，合并到主干时未考虑兼容性。

建议先完成：功能性审核，再讨论代码样式和规范。

[zonghaishang]

Dubbo does not use the hessain1 protocol.
I have fix hessian1 protocol , see: #1616

[takeseem]

今天仔细看下代码，hessian1确实没有用了，建议从hessian-lite中移除。
多余的代码需要维护！

这确实是我对dubbo了解的还不够，想当然看到有hessian1就以为还需要兼容。

[chickenlj]

Hi takeseem,

Thanks for your suggestion, also very sorry for the incompatible problems brings to you. We should pay more attention on change compatibilities, especially for legacy systems using old framework/protocol versions. At least, there can be a compatible notification.

[chickenlj]

For hessian1, i also recommend remove from hessian-lite

[diecui1202]

#1616 has been merged. I submit a new issue for hessian-lite #1778

So please close this issue.