【P0】Codis getrange command bug

[luky116]

Is this a regression?

Yes

Description

The getrange of codis does not return the expected results, as shown below:
codis 的 getrange 没有返回预期的结果，如下图：

The following is directly connected to Pika, which can get the expected results:
下面是直接连 Pika，能得到预期的结果：

The test command is as follows:
测试命令如下：
set adfasdf "This is a string"
getrange adfasdf 0 3

Expected return results:
期望返回结果：
This

If the repair is completed, remember to open the "should GetRange" test under pika/tests/integration/codis_test.go
如果修复完成，记得把 pika/tests/integration/codis_test.go 下面的 "should GetRange" 测试打开

[luky116]

补充：发现是 Pika 侧返回 getrange 的值不稳定导致的，看起来是 Pika 侧的问题