serialize some async functions in node 2

serializedemo2.js

var init = require('./test/common/init');

// a list of functions that we want to call, in order
var steps = [
  init.createSubscriberTable,
  init.clearSubscriberTable,
  init.createTestSubscribers,
  init.createSubscriberNoticesTable,
  init.clearSubscriberNoticesTable,
  init.createTestSubscriberNotices
];