Add a tool that checks chamelium state
From time to time Chameliums seem to go into weird state. This stops all Chamelium-based testing on that given host. The syndrome is that any connection to chamelium:9992 gets refused.
We should add a tool that tries to connect chameliums periodically, and if it fails send an email notification to people with physical access to the HW. We can run it as a part of our infra.