ctests: ignore some lyx2lyx tests that fail

ctests: ignore some lyx2lyx tests that fail

From Jürgen [1]:

  These are old problems. One is related to a questionable nomencl change
  which we addressed in master but not in stable, see
  https://www.lyx.org/trac/ticket/10634#comment:2

  The other is due to CJK quotation marks which are not supported in 2.3.

We ignore, rather than invert, since no plans to fix these.

[1] https://www.mail-archive.com/lyx-devel@lists.lyx.org/msg218237.html