Remove usage of unused 'host' asterisk config option
The 'host' config option has been removed from asterisk config some time ago, instead we should use 'outbound_proxy' for the following tr104 parameters: Device.Services.VoiceService.{i}.SIP.Network.{i}.ProxyServer Device.Services.VoiceService.{i}.SIP.Network.{i}.RegistrarServer the same as for: Device.Services.VoiceService.{i}.SIP.Network.{i}.OutboundProxy