QA: Ensure wiki is setup with terms of use link

Vanilla MediaWiki installs do not have this, so let's be more
explicit to ensure the ui_links.feature always passes for new developers
who are running it for the first time

Change-Id: Ib1a52141e8265794f068c91353d5bd8e854d4b4d
Merge "QA: Ensure wiki is setup with terms of use link"