Making switchTo().window more standard compliant

Author: barancev

java/client/src/org/openqa/selenium/remote/RemoteWebDriver.java

@@ -937,7 +937,7 @@ public WebDriver parentFrame() {
     }
 
     public WebDriver window(String windowName) {
-      execute(DriverCommand.SWITCH_TO_WINDOW, ImmutableMap.of("name", windowName));
+      execute(DriverCommand.SWITCH_TO_WINDOW, ImmutableMap.of("name", windowName, "handle", windowName));
       return RemoteWebDriver.this;
     }