We have DOMComplete in WebPageTest but we don't send it to Graphite. Let us add it so we can follow changes when we do the Resource Loader 2018 review.
Reopening since this is rollbacked in https://gerrit.wikimedia.org/r/#/c/performance/WebPageTest/+/439654/
Somehow this broke sending a lot of other metrics to Graphite. Lets make sure we log the full URL in Jenkins in step 1 so it's easier to just see the problem.