This class describes the DAV options useful to LO.
Added behavioural unit tests as well.

Change-Id: I7ba0230f1a1469b12f9b3f59f21e5c2730c65b81
Reviewed-on: https://gerrit.libreoffice.org/27595Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Giuseppe Castagno <giuseppe.castagno@acca-esse.eu>