title: How do i add custom headers for my nightwatch.js tests?
body: <p>So I been digging the web (google, stackoverflow, github) trying to find a simple way to add custom headers to my tests. So far nothing pop out. Maybe some thing for java or firefox, but nothing clear.</p>
  
  <p>I'm using:</p>
  
  <ul>
  <li>NodeJS: v6.11.3</li>
  <li>Nightwatch: 0.9.16</li>
  <li>ChromeDriver: 2.32</li>
  <li>Selenium 3.5.3 </li>
  </ul>
  
  <p>So what i would like is that headers would propagate in all tests including 302 Redirects</p>
  
  <pre><code>before: {
    this.setHeaders = {
        "X-CUSTOM-HEADER-A": "Data-A",
        "X-CUSTOM-HEADER-B": "Data-B",
    }
  }
  </code></pre>
  
  <p>Is there something like this avaliable? Any chromedriver args maybe? </p>