Replace updater.sh with updater-suppervisor.py or something
It's clear that updater.sh is now in state where it's almost unmaintable and there is requirements from foris to post updater's state to foris-controller. It's clear that we would have to implement some suppervising daemon for updater (it might be running only if updater is running. In different words it would be executed and killed by updater.sh). But there might be even better solution for this. What about if we create updater-suppervisor.py (or some better name?) instead of updater.sh or as something that updater.sh runs. That would replaced current functionality of updater.sh with cleaner code and could also post status of updater to foris-controller on its own.