Don't log 404s
Don't log 404s

Summary: These are pretty common and do not indicate bad behavior (checking if a tag exists, for example).

Reviewers: #kraken, O1553 Project kraken: Add blocking reviewers, yiran

Reviewed By: #kraken, O1553 Project kraken: Add blocking reviewers, yiran

Subscribers: jenkins

Differential Revision: https://code.uberinternal.com/D2213575

uber/kraken,uber/kraken,uber/kraken,uber/kraken,uber/kraken