Update azure-arm-network to 8.1.0
Update azure-arm-network to 8.1.0

Azure/azure-sdk-for-node,Azure/azure-sdk-for-node,xingwu1/azure-sdk-for-node,Azure/azure-sdk-for-node,xingwu1/azure-sdk-for-node,xingwu1/azure-sdk-for-node