Refactor to use Microsoft azure-sdk-for-ruby

[chessbyte]

We currently use Azure Armrest gem that was developed by ManageIQ. To minimize maintenance burden, we should switch to Azure SDK supported by Microsoft.

[djberg96]

Just so you know what features azure-armrest has that you will have to reimplement using the SDK:

https://github.com/ManageIQ/azure-armrest/wiki/About-This-Library#some-features-of-note

There may be others I'm forgetting, but that's a start.

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