Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  69a4cea648a88a29d53cff31355e40665baf3b68

QA: Thanking another users post

For the test on thanking another user's post, we have to assume
    that at least one such post exists. Otherwise the step is marked
    as 'pending' to avoid failure.

    The best practice would be to create a post in the Given clause,
    but since that requires another user account, and it is not part
    of the standard setup (which only has one ENV['mediawiki_user'],
    this approach was not chosen.

Change-Id: I0c67a4f8d44ca04a5e7ab32eff4076a46c3c9752