Fails with commit 83b43ef2 (sw mail
merge: add support for the new 'writer' connectivity driver, 2017-07-18)
reverted.

Change-Id: I675e15bdbc655a34cca3de2b5d070167ca69cac8
Reviewed-on: https://gerrit.libreoffice.org/40174Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>