test: resolve root modules directory in test (PatrickJS#1405)

Current resolution is incorrect. This is a quickfix.

Author: shlomiassaf

config/webpack.test.js

@@ -51,7 +51,7 @@ module.exports = function (options) {
  /**
  * Make sure root is src
  */
- modules: [path.resolve(__dirname, 'src'), 'node_modules']
+ modules: [helpers.root('src'), 'node_modules']
 
  },