Fix serialization of review replies for webhook payloads.
Review Request #7750 — Created Nov. 2, 2015 and submitted
We were serializing review replies using the review resource, which mostly
worked, but the links were incorrect. Using the review_reply resource instead
fixes this.
Ran unit tests.
Tool: Pyflakes Processed Files: reviewboard/notifications/webhooks.py reviewboard/notifications/tests.py Tool: PEP8 Style Checker Processed Files: reviewboard/notifications/webhooks.py reviewboard/notifications/tests.py