message: Autofix linting issue
diff: @@ -4,7 +4,7 @@ const util = require("util");
  var instance = null;
  function MockAppService() {
  - let self = this;
  + const self = this;
  this.expressApp = {
  post: function(path, handler) {
  @@ -39,12 +39,12 @@ MockAppService.prototype._linkAction = function(reqBody, statusCallback, jsonCal
  throw new Error("IRC AS hasn't hooked into link/unlink yet.");
  }
  - let req = {
  + const req = {
  body : reqBody,
  getId : () => 'test@' + Date.now()
  };
  - let res = {
  + const res = {
  status : function (number) { statusCallback(number); return res;},
  json : function (obj) { jsonCallback(obj); return res;},
  }
  @@ -68,12 +68,12 @@ MockAppService.prototype._unlink = function(reqBody, statusCallback, jsonCallbac
  // statusCallback {function} - Called when the server returns a HTTP response code.
  // jsonCallback {function} - Called when the server returns a JSON object.
  MockAppService.prototype._listLinks = function(reqParameters, statusCallback, jsonCallback) {
  - let req = {
  + const req = {
  params : reqParameters,
  getId : () => 'test@' + Date.now()
  };
  - let res = {
  + const res = {
  status : function (number) { statusCallback(number); return res;},
  json : function (obj) { jsonCallback(obj); return res;},
  }
  