CppunitTest_xmlsecurity_signing: add 2 more ODF / XAdES tests

1) Make sure we handle the case when the document has a signature
stream, but it's empty.

2) Make sure we find a given XAdES-enabled ODF document valid.
Previously this was tested only dynamically, i.e. breaking both the
import and the export at the same time went unnoticed.

Change-Id: Icaa29cfa1f5b817459239ee8dbdc3bf023a2a1a7
Reviewed-on: https://gerrit.libreoffice.org/31413
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

0 files changed, 0 insertions, 0 deletions