Support filtering FileDiffs in the WebAPI by their commit

Review Request #9757 — Created March 7, 2018 and submitted — Latest diff uploaded

Information

Review Board
release-4.0.x
78fba15...

Reviewers

The FileDiff list resource now supports filtering by a commit ID via
passing the ?commit-id=<id> query parameter. Doing so will limit the
results to FileDiff objects who are associated with that commit.
Passing an invalid commit ID will result in no results being returned.

Ran unit tests.