Adding rb-gateway webhook and template for registering webhooks
Review Request #9700 — Created Feb. 24, 2018 and updated — Latest diff uploaded
Task 3 for Rb-Gateway Webhooks feature: Adding webhook receivers in Review Board to close review requests when commits are posted.
Added html template for adding webhooks. Pretty much a copy-pate of
github.pywith some tweaks for rb-gateway-specific headers.
Along with r/9585, the webhook successfully returns and closes the review request.