Added metrics tracking for the portal sample solution readme
Added metrics tracking for the portal sample solution readme

OneBitSoftware/PnP,IvanTheBearable/PnP,OfficeDev/PnP,IvanTheBearable/PnP,PaoloPia/PnP,PaoloPia/PnP,OneBitSoftware/PnP,PaoloPia/PnP,OneBitSoftware/PnP,OfficeDev/PnP,OfficeDev/PnP,PaoloPia/PnP,OneBitSoftware/PnP,IvanTheBearable/PnP,OfficeDev/PnP