repo-updater: update aws codecommit module
Created by: keegancsmith
AWS now just takes a Doer interface for the HTTP client. We now can't get at the http.Client used by AWS. However, we can get the transport. We then configure the transport in the same way. What is missing is the customizations to the client (has to do with retries). I can copy the code required for that in. WDYT?