add more validation for host:mac entries in HostManager.getHostsAsync
add more validation for host:mac entries in HostManager.getHostsAsync

firewalla/firewalla,MelvinTo/firewalla,MelvinTo/firewalla,firewalla/firewalla,firewalla/firewalla,firewalla/firewalla,firewalla/firewalla,MelvinTo/firewalla,MelvinTo/firewalla,MelvinTo/firewalla