title: Run mocha tests parallelly using selenium grid
body: <p>I have 1000 test files similar to following test file. I would like to setup selenium grid inorder to run these tests parallelly on different machines. After setting up selenium grid and multiple nodes, I ran "mocha test/"..This runs all tests under test folder sequentially. I would like tests to be run parallely. How do I specify to run tests parallelly when I run them as mocha?</p>
  
  <pre><code>var driver = require("selenium-webdriver");
  driver = new webdriver.Builder().
      usingServer(server.address()).
      withCapabilities({'browserName': process.env.browserName}).
      build();
  
  it('should append query to title', function() {
          driver.get('http://www.google.com');
          driver.findElement(webdriver.By.name('q')).sendKeys('webdriver');
          driver.findElement(webdriver.By.name('btnG')).click();
          driver.wait(function() {
              return driver.getTitle().then(function(title) {
                  return 'webdriver - Google Search' === title;
              });
          }, 1000);
      });
  </code></pre>