title: Webpack 2.2.0 with Module.noParse doesn't transpile 'require' of externals
body: <p>I'm moving from Webpack <code>1.x</code> to <code>2.x</code> and faced trouble. I would like to have all my vendor's libs be ignored by Webpack, because I prepared them by gulp. </p>
  
  <p>In <code>webpack.config.js</code> I have <code>module.noParse</code> like:</p>
  
  <pre><code>noParse: /react|react-dom|redux|react-redux|lodash/
  </code></pre>
  
  <p>And I have <code>externals</code> section:</p>
  
  <pre><code>externals: {
      'react': 'React',
      'react-dom': 'ReactDOM',
      'redux': 'Redux',
      'react-redux': 'ReactRedux',
      'lodash': '_',
  }
  </code></pre>
  
  <p>So, in Webpack <code>1.x</code> it works perfectly, but version <code>2.2.0</code> gives:</p>
  
  <pre><code>var _react = require('react');
  
  Uncaught ReferenceError: require is not defined`
  </code></pre>
  
  <p>If I delete the <code>noParse</code> rule, webpack will include vendors in package and everything will be wrapped with <code>var react = webpack_require</code> and works fine.</p>