Cloudformation does not surface error messages generated by Transfer Family on `InvalidRequestException`

[mayurm88]

Reproduction Steps

1. Create an AS2 certificate using a Cloudformation stack
2. Create an AS2 profile and use the certificate id generated in Step 1 as a certificate in the profile.
3. Delete the Cloudformation stack created in Step 1.
4. We get an InvalidRequest error code in Cloudformation which does not have any information about what is wrong with the request.

The error in Cloudtrail does have the correct error message.

[aws-sde]

Resolved by #42