NewCommonMockDSL is a constructor for CommonMockDSL.

CommonMockDSL holds common data for all mocked DSLs.

Reply interface allows to wait for a reply to previously called Send() and extract the result from it (success/error).

CommitFunc is function called from inside DSL to trigger commit processing(applying TxnOp-s retrieved by DSL,...) in TxnTracker.