Upsert does not work for MySQL

ISPN-20, merged recently (thanks!), added "upsert" support for JDBC cache stores. The "upsert" SQL statement is database-type-dependent and the one for MySQL has a different "API" than the one for other database types - whereas all the others use the same number and order of placeholders as the equvalent INSERT statement, so that the same method can be used to update the INSERT, UPDATE and "upsert" statement, the MySQL one adds additional placeholders and the aforementioned method is no longer sufficient.

The exception is:
java.sql.SQLException: No value specified for parameter 4