Log gate response

Summary:
For better visibility and contxt in Sentry, log the response sent to
the automated service with how the notification has been processed.

Test Plan:

• Units tests added to omnitools for the toArray() method
• Once deployed, Sentry should get two new new log.info entries

Reviewers: dereckson

Reviewed By: dereckson

Differential Revision: https://devcentral.nasqueron.org/D2957