updating UWP appxmanifest to have a standard package identity
updating UWP appxmanifest to have a standard package identity

MatkovIvan/azure-mobile-apps-net-client,MatkovIvan/azure-mobile-apps-net-client,Azure/azure-mobile-apps-net-client,MatkovIvan/azure-mobile-apps-net-client,Azure/azure-mobile-apps-net-client,Azure/azure-mobile-apps-net-client