Similar to the calc one. As a first step the Driver and the Connection
interfaces are implemented, though the later has some stubs.

Change-Id: Id043f7742fdb2006d4f88526ef4d055a6d8dee82
Reviewed-on: https://gerrit.libreoffice.org/40033Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>