ANF-368 new SDK for R5 (2019-07-01 API)

[leonardbf]

https://github.com/Azure/azure-rest-api-specs/tree/master/specification/netapp/resource-manager/Microsoft.NetApp/stable/2019-07-01

Change of export policy naming NFSv4 to NFSv4.1
Change of creation date naming for snapshot.

Description

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