title: Touch action not working in java client 2.1.0 for ios automation
body: <pre><code>WebElement element = driver.findElement(By.id("testElement"));
  Point point = element.getLocation();
  Dimension size = element.getSize();
  
  int elementCenterX = point.getX() + Math.round(size.getWidth() / 2);
  int elementCenterY = point.getY() + Math.round(size.getHeight() / 2);
  
  String originalContext = driver.getContext();
  driver.context("NATIVE_APP");
  driver.tap(1, elementCenterX , elementCenterY , 1000);
  driver.context(originalContext );
  </code></pre>
  
  <p>I tried this not working in osx 10.10,xcode 6.1 and appium 1.3.4. java_client 2.1
  Any suggestion for how to touch action in real device using appium driver.</p>