code: function getServerAliases(flapjack, options) {
      options = options || {};
      var aliases = getAliases('server', flapjack);
      var serverAliases = options && options.serverAliases;
      return _.extend({}, aliases, serverAliases);
  }
docs: Get the Server param mappings
  @param flapjack
  @param options
  @return {{}}