Rm cannot find primary key when primary key is Uppercase in sql ,using MySQL.

[VainEffort]

• I have searched the issues of this repository and believe that this is not a duplicate.

Ⅰ. Issue Description

when I write a Insert SQL which the primary key is uppercase, RM cannot generate afterimge.
I find InsertExecutor.containsPK() judge if pk exists by comparing MySQL table metadata with the result of SQL recognizer. Which compare the lowercase PK and uppercase Pk.
When this table dosenot have auto-increase PK, RM throw exception.

Ⅱ. Describe what happened

If there is an exception, please attach the exception trace:

Just paste your stack trace here!

Ⅲ. Describe what you expected to happen

Ⅳ. How to reproduce it (as minimally and precisely as possible)

1. xxx
2. xxx
3. xxx

Ⅴ. Anything else we need to know?

Ⅵ. Environment:

• JDK version :
• OS :
• Others: Seata 0.6.1