Simplify tests checking the order of countries.
Simplify tests checking the order of countries.

* Although it's more end-to-end to check the HTML elements, in this case I don't think we don't lose much by checking the value of the assigned instance variable instead.
* And there is at least one other test that checks the HTML elements are present.
* This is also more consistent with other tests of the same ilk.

robinwhittleton/whitehall,askl56/whitehall,alphagov/whitehall,robinwhittleton/whitehall,alphagov/whitehall,ggoral/whitehall,YOTOV-LIMITED/whitehall,hotvulcan/whitehall,robinwhittleton/whitehall,alphagov/whitehall,ggoral/whitehall,hotvulcan/whitehall,YOTOV-LIMITED/whitehall,hotvulcan/whitehall,alphagov/whitehall,hotvulcan/whitehall,ggoral/whitehall,YOTOV-LIMITED/whitehall,YOTOV-LIMITED/whitehall,robinwhittleton/whitehall,askl56/whitehall,askl56/whitehall,askl56/whitehall,ggoral/whitehall