[WFCORE-38] Add console option to target of console-handler

Adds an option to use the ```System.console()``` for the console-handler. Kept default of ```System.out```.
Although I think this should be a reject, I am wondering if someone used ${blah.console:console} if the replacement would not cause that to be ${blah.System.out:System.out} rather than ${blah.console:System.out}.