dispatcher.ggpServerProcess: correctly builds args

- Constructor takes additional parameters, the ones that are required as
  args by GameServerRunner
- Added a method to add hosts (players), based on
  address+identifier+port
- Added a class to group together the host fields
worker.ggpPlayerProcess: added params to constructor for ggp-base PlayerRunner class's args.
util.java_runner bugfix: accidentally committed--and pushed--some debug output!