Just some information for other users that land here like me: It works fine with sysvinit but fail with systemd mainly because the script that do the job is part of sysvinit (look at the top of the bug page "Source for initscripts is src:sysvinit" ;) ).
And the scripts are not really portable to systemd (look at /lib/init/mount-functions.sh, /etc/init.d/mountall.sh, and others from the package: hard to use with systemd). And anyway, systemd is designed to do the mounting job itself. So the best bet with systemd is to add a line in fstab by yourself. Or maybe create a .service file to include in systemd but it's probably largely overkill. In fact, the maintainer may flag this bug as wontfix. cya -) -- xakz