all email addresses added by the loadgen tool end with @loadtest.domain

lib/load_gen/user_db.js

@@ -47,7 +47,7 @@ var users = [ ];
 exports.num = function() { return users.length; }
 
 function genEmail() {
-  return secrets.generate(8) + "@" + secrets.generate(8) + "." + secrets.generate(3);
+  return secrets.generate(16) + "@loadtest.domain";
 }
 
 // a little utilitiy function to get any one of an array of items