renamed get_failed_open_node_a8_logs.sh -> setup_a8_nodes.sh
added serial_flooder() to setup_a8_nodes.sh
updated get_experiment_status.sh to handle 'all-deployments-ok' case
added wait_for_ssh_access.sh
updated run_all.sh to perform a8 tests
updated run_all.sh printf trace length
updated wait_for_ssh_access.sh to wait on deployed-ok nodes only
updated README.md (enhancements done)