Update defaults to Railo 4.2.1.000

Hi Roland, now that Railo 4.2.1.000 is the latest stable release I figured it sensible to update the defaults (and also update the 4.2 version to the latest stable rather than initial release / beta).

Not sure whether you wanted the defaults to be 4.2, but thought I'd just change it anyways (easier to suggest it in a pull request that might be refused).

Awesome work on the cookbook, really appreciated.