Transactionsqueue - Rerun transactions worker script

Hi @rcrichton and @devcritter. When you guys get a chance please have a look at the code that was added for the transactions rerun process. Thanks
This is present in the mongoose examples I saw to save a object. I wasnt sure if this is a required parameter which is why i kept it in. But i have done a test and its not needed so i have removed it from the code.