Bug 926357 - Write a test to use the 'Number' keyboard

Hi!
I followed the steps indicated in bug description, beside the 4th one: "Assert the correct keyboard is shown". I passed the "number" keyboard as a parameter when using the switch_to_keyboard mehod instead. Even though I modified that method in the keyboard.app page, it won't affect other tests that use it, because I added _default_keyboard as default parameter, which is the standard keyboard. 
Thanks!