b12c5d5d12
+changed flake8 to version 3.3.0 to support python3.6 Stop agents and then reboot VM. All the dnsmasq processes should stay alive while the agents are down to serve existing DHCP leases. Because of the dnsmasq process is restarted right after the DHCP agent became UP and running we need to make sure that we are waiting enough time for the dnsmasq processes to be available. Change-Id: I06b8ad68657fef0d381fe4f9f2e85105c181d0c0