Add SinkSubsequentCreditsTest
Add SinkSubsequentCreditsTest

Reviewed By: thedavekwon

Differential Revision: D38677734

fbshipit-source-id: 678f4a18e6006873092953fc4a00008e44cb5278

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift