Use separate green_lights per commit, to avoid a race condition where we tell WFD to shut down, mark the other version, then re-set the green light for WFD on the newer version
Use separate green_lights per commit, to avoid a race condition where we tell WFD to shut down, mark the other version, then re-set the green light for WFD on the newer version

Yelp/paasta,Yelp/paasta