[natmch][tests] Add method to reboot all AMC slots + tests
Add new method to the NATMCHTelnet class to reboot all AMCs. Uses the 'shutdown all' command to power down all slots, then powers on all populated slots one-by-one.
Unit tests added.
Add new method to the NATMCHTelnet class to reboot all AMCs. Uses the 'shutdown all' command to power down all slots, then powers on all populated slots one-by-one.
Unit tests added.