Cell Value xlsx import test

[Markus Mohrhard]

Hey Daniel,

> I finally had time to work on this cell value xlsx import test task.  I
> attached what I have so far for the test.  I just wanted to make sure I'm
> going in the right direction and see what recommendations you might have.
>
> So far, I just have some basic test values to make sure I could get "make
> -sr slowcheck" to both pass and fail.
>

The test is perfect. I pushed it already to master:
http://cgit.freedesktop.org/libreoffice/core/commit/?id=f45de1bed2f116ba3846c6fc2b1eb52f757c25f0.

Thanks for this test.

Regards,
Markus