docs: updated instructions for running request tests

Author: analog-nico

run-request-tests.md

@@ -19,11 +19,11 @@ var BPromise = require('../request-promise/node_modules/bluebird')
 BPromise.onPossiblyUnhandledRejection(function (err) {
   return err
 })
-module.exports = require('../request-promise/lib/rp.js')
+module.exports = require('../request-promise/')
 ```
 
 6. Go to temp/request-promise/lib/rp.js
-7. Comment out the whole `var request = (function () { ... })();` block.
+7. Comment out the `var request = stealthyRequire('request');` line.
 8. Add `var request = require('../../request/index-orig.js');` right below.
 9. Go to temp/request/ and run `npm test`.