Update parserTests.txt from upstream.

This adds extra attributes to parsoid-specific tests to enable more
accurate testing of advanced parsoid features (images, templates, etc).

The upstream test case changes were reviewed/merged in
https://gerrit.wikimedia.org/r/62121

Thirteen new parser tests pass.

Depends: https://gerrit.wikimedia.org/r/62121
Change-Id: I4a56b4bdc0beebb1e6a3d47eb77d8ba9a5db3a5a