See if we can change SqlClientBatchingBatcher to batch everything, not just identical statements

This fix sometimes cause this error:
System.Data.SqlClient.SqlException : The request failed to run because the batch is aborted, this can be caused by abort signal sent from client, or another request is running in the same session, which makes the session busy.

This isn't an important feature, so we can just give it up

It break some others tests.
The specific test should test the behavior with classes with different properties and different parameters.

Fixed