WebAssert::addressEquals($page) should not remove query part

I think this is not right that I can not write something like that
```
I should be on "/login?return_url=/user"
```
in my feature context

Actually I can write, but under the hood MinkContext will remove query part from url. Interesting that it will not remove fragment part: https://github.com/Behat/Mink/blob/master/src/Behat/Mink/WebAssert.php#L647

This is copy from https://github.com/Behat/MinkExtension/issues/144