Notification Hub - Can't update Google API key

**Issue**
We're using an Azure CLI script to update the Google API key of this Notification Hub. However, `az notification-hub credential gcm update` started randomly "failing". This Azure CLI command doesn't seem to have a timeout; it just spins forever.

`az notification-hub credential gcm update --resource-group $resourceGroup --notification-hub-name $notificationHub --namespace-name $hubNamespace --google-api-key $googleKey`

We've contacted Azure support about this and they told us that, to perform this operation, Azure contacts Google's servers to validate those gcm credentials. This is a synchronous operation. Google is taking 85 seconds to perform that validation, and Azure is timing out after 60 seconds, so the request doesn't get through.

**Suggestion**
Adding a timeout parameter or simply timeout after ~60 seconds, instead of running forever.