XFAIL tst_QWebEngineFrame::setUrlHistory

Update the checks to cover the case where the count could be the same
with different URLs, and mark those checks as currently failing because
QtWebEngine doesn't have the logic preventing QUrl() to affect the
history.

Change-Id: Id0260d21d32d9e85fbd14f44536c2c93b6eb40b1
Reviewed-by: Michael Bruning <michael.bruning@digia.com>