Handle all successful status codes

[symm]

I have an API which a returns 201 successful status code when an entity is created. Insights is currently incorrectly logging these requests as unsuccessful:

[msftclas]

Hi @symm, I'm your friendly neighborhood Microsoft Pull Request Bot (You can call me MSBOT). Thanks for your contribution!

In order for us to evaluate and accept your PR, we ask that you sign a contribution license agreement. It's all electronic and will take just minutes. I promise there's no faxing. https://cla.microsoft.com.

TTYL, MSBOT;

[msftclas]

@symm, Thanks for signing the contribution license agreement so quickly! Actual humans will now validate the agreement and then evaluate the PR.

Thanks, MSBOT;