Sync parserTests with core.

This matches upstream commit bc97a03f06bfb4bfd33cd2ec2a127c2f607e34e2.

Added "Namespace takes precedence over interwiki link (bug 51680)"  to
blacklist for html2wt and html2html because without rel="mw:WikiLink" the
link is not recognized correctly.

Change-Id: Ic21439a6b65eff1d0f9ce9ab4a9f9bb66f9ed0eb