Puppetserver incurs a perfomance penalty when i18n is enabled as different text domains need to be managed per environment. For 7 we should change the default value of the disable_i18n setting to true. Agents should skip pluginsync'ing the locales mount as a result.
Changing the name of the setting creates upgrade issues. If you've set `disable_i18n=false` explicitly, and then upgrade to 7, then puppet won't recognize the old setting, and the behavior of "I really want i18n to be enabled" will be lost.