Fix use of undefined property in BlobResult object
Fix use of undefined property in BlobResult object

This replace use of `blob` proerty with `name` property for the
BlobResult object in sample source code.

See:
https://github.com/Azure/azure-storage-node/blob/dev/BreakingChanges.md

Thanks!

Azure/azure-storage-node,Azure/azure-storage-node,XiaoningLiu/azure-storage-node,XiaoningLiu/azure-storage-node