Provide option to specify statements to be executed upon connection creation (e.g. connection wait timeout)

Related to #DBZ-690

Mysql connector can run into connection reset exception because of wait timeout when the initial filling of debezium history topic takes a lot time. Large schema and producer settings like ack=all can slow down producer so this step can take almost 10 minutes.

So could debezium SET wait_timeout before starting snapshot? I think 2000 seconds is safe margin.

'SET SESSION wait_timeout=2000'