title: selenium.common.exceptions.WebDriverException: Message: unknown error: cannot kill Chrome error with gallium and Docker
body: <p>After each scenario run our tests will do .quit() on the remote webdriver - </p>
  
  <pre><code> Quits the driver and closes every associated window.
  </code></pre>
  
  <p>Running tests in docker containers (selenium hub and selenium-chrome version <strong>3.14.0-gallium</strong></p>
  
  <p>All of the tests are passing am getting a false negative because there are WebDriver Exceptions.</p>
  
  <pre><code>selenium.common.exceptions.WebDriverException: Message: unknown error: cannot kill Chrome
    (Session info: chrome=69.0.3497.100)
    (Driver info: chromedriver=2.42.591071 (0b695ff80972cc1a65a5cd643186d2ae582cd4ac),platform=Linux 4.14.67-coreos x86_64)
  </code></pre>
  
  <p>this is traced back to </p>
  
  <pre><code>python3.5/site-packages/selenium/webdriver/remote/webdriver.py", line 606, in quit
      self.execute(Command.QUIT)
  </code></pre>
  
  <p>the Chromedriver and chrome version are supposed to be compatible per documentation. </p>