kafka integration test since open protocol flag is incorrect

Run the following SQL:
```
create table t(id int primary key)
insert into t values (1)
```

The tiflow result:
```
{"u":{"id":{"t":3,"h":true,"f":11,"v":1}}}
```

The ticdc result:
```
{"u":{"id":{"t":3,"h":true,"f":4099,"v":1}}}
```