Saving Zone is done all at once instead of in batches

[asleeponduty]

With the Nimitz update, the following command was implemented to help with the lag-outs that occured when larger arenas were reset.
/warcfg resetspeed:5000
Unfortunately, this resetspeed doesn't seem to apply to /savezone command.
Players typically time out whenever a large zone is updated and saved.
Tested on Spigot-1649+20140927a patch