send back all usersync pixels on first request to save a bounce (#28)
send back all usersync pixels on first request to save a bounce (#28)

* send back all usersync pixels on first request to save a bounce

* go fmt

prebid/prebid-server,cindyhere33/prebid-server,cindyhere33/prebid-server,prebid/prebid-server,prebid/prebid-server,cindyhere33/prebid-server