Ignore tests using window_handles on Marionette due to a bug in GeckoDriver

Author: davehunt

py/test/selenium/webdriver/common/window_switching_tests.py

@@ -24,6 +24,7 @@
 
 class WindowSwitchingTests(unittest.TestCase):
 
+    @pytest.mark.ignore_marionette
     def testShouldSwitchFocusToANewWindowWhenItIsOpenedAndNotStopFutureOperations(self):
         self._loadPage("xhtmlTest")
         current = self.driver.current_window_handle