I cannot look more fully into why these tests are failing at the moment, but the blanket failure only seems to be affecting Mac. I'll skip them for the moment.
Committed r139148: <http://trac.webkit.org/changeset/139148>
Reopen, because the bug is still valid, only the skip patch was landed.
We had an earlier bug that tracked a smaller subset of auth tests on WK2.
Authentication is all broken in WebKitTestRunner on Mac, so the fix is common.
*** This bug has been marked as a duplicate of bug 81627 ***