Make ResolveRefsPass required
Make ResolveRefsPass required

Summary: ResolveRefs is required. It aligns and removes all pure refs. Many passes assume that for their input. So we should emit the trait that it's required.

Reviewed By: thezhangwei

Differential Revision: D22520628

fbshipit-source-id: 5f234f7d6f1b359705d40e6215530a659ca37fe4

facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex