Bug 1071312 - [FTU][FxA] Button still reads as 'Skip' after the user log...

...s into a Firefox Account in the FTE.
I'd rather transform this test into a suite, so we can have individual tests instead of checking for different things (buttons, message) in the same one. e.g.
```javascript
suite('Verified login', function() {
  var verifiedAcct;
  setup(function() {
    verifiedAcct = {
      email: 'foo@bar.com',
      verified: true
    };
    UIManager.fxaGetAccounts(verifiedAcct);
  });

  test('show correct success message', function() {
    assert.isTrue(localizeSpy.calledOnce);
    assert.equal('fxa-signed-in', localizeSpy.args[0][1]);
  });

  test('correct label on button', function() {
    assert.equal(nextButton.firstChild.textContent, _('navbar-next'));
  });
});
```