The C++ tests are now located in sheetsortdescriptor2.(hxx|cxx), because
this is the latest implementation of the UNO API interface
(SheetSortDescriptor2.idl).

Change-Id: I5b11a38f6cd0473714c4d57ee92889bfd7605e83
Reviewed-on: https://gerrit.libreoffice.org/52930Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Jens Carl <j.carl43@gmx.de>