[Pkg-samba-maint] Bug#739887: Fix is not convenient for sysv users

[Eric Valette]

Note that as I was affected by the bug preventing systemd to shutdown at 
reasonable speed I removed the dependency lines. It may be fine for 
systemd but it is still buggy for sysv init: the shutdown scripts are 
called multiple times and thus it make the shutdown slows as it wait 
before trying to kill the daemons. It slows down all the machines I have 
(and yes I reran insserv after making the change).

-- eric