Updated sample code of Azure Key Vault.

[goh-chunlin]

No description provided.

[msftclas]

All CLA requirements met.

[PRMerger19]

@goh-chunlin : Thanks for your contribution! The author, @BryanLa, has been notified to review your proposed change.

[prashanthyv]

Thank you for your change request. I agree with changing the code to use a do while instead. but for the exponentialBackoff time to account for the worst case, I would much rather have it as a long instead of an int. Can you please make that change?

[PRMerger19]

@goh-chunlin : Thanks for your contribution! The author, @BryanLa, has been notified to review your proposed change.

[goh-chunlin]

Hi @prashanthyv, I have updated it to use long instead of int. =)

However, would long make sense in real-world situations? What would be the use case that we need to such a "long" waiting time?

[BryanLa]

Thanks @goh-chunlin !
I'll go ahead and get this merged, and let @prashanthyv respond in this PR when he's able.

#sign-off

[prashanthyv]

Thanks @BryanLa . @goh-chunlin - I agree that "long" would most likely not happen