[Network] PublicIP Tags and Network API 2017-11-01

[tjprescott]

Closes #5052.

DNM until Yugang's work is merged.

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[azuresdkci]

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[derekbekoe]

All the recordings... 🥇

[tjprescott]

Well, assuming the recordings still are good after the rebase .... we shall see.

[tjprescott]

Ha! At long last!!