title: Selenium internet explorer driver binary in json configuration
body: <p>I have selenium grid and I am trying to config node that is responsible for internet explorer. I need to set location of ie driver. I can do it when I run the selenium-server via command line argument:</p>
  
  <pre><code>java -jar selenium-server.jar -role node -Dwebdriver.ie.driver=path_to_driver.exe
  </code></pre>
  
  <p>however if I try to put this setting in config.json:</p>
  
  <pre><code>"configuration":
  {
      "webdriver.ie.driver": "path_to_driver.exe"
  }
  </code></pre>
  
  <p>It does not work. What is wrong?</p>