(Backend) - Sending Feedback Notification Reports Success Despite Underlying Failure In Server To Send Email

[mjperry91]

Describe the bug
When sending a notification reminder for an existing review feedback the backend will report a 200 ok status despite an underlying error occurring with mailjet that results in the email actually failing to be sent.

To Reproduce
Steps to reproduce the behavior:

1. Run on local and ensure you don't have a mailjet api key set to ensure email fails to send.
2. Go to feedback/view feedback
3. Click the drop down carrot on an individuals feedback
4. Click the notification bell icon to send a request.
5. Observe you get a successful green popup that says the notification was sent, when in fact if you look at the logs you will see a mailjet failure error.

Expected behavior
If an email fails to send the server should report this to the UI.

[mjperry91]

#2389