autofs unmounts seem to occur even after setting timeout=0

Seems like just [reloading autofs](https://github.com/cvmfs-contrib/ansible-cvmfs-client/blob/master/handlers/main.yml#L9) may not be sufficient to apply timeout=0, because repos appeared to be getting unmounted after a short time.
It didn't seem to happen anymore after a reboot , so maybe an autofs restart is needed, but that can be rather disruptive.