Allow the use of an existing SQLExceptionTranslator #400
Description
Currently the MybatisExceptionTranslator hardcodes an SQLErrorCodeSQLExceptionTranslator as a fallback, and it is not possible to change this, e.g. to the Java6-supported spring default SQLExceptionSubclassTranslator, or an SQLStateSQLExceptionTranslator, or a custom translator.
It would be nice to have that fallback configurable.