update karma job to use chrome build image created by gitlab-build-images!41

.gitlab-ci.yml

@@ -441,7 +441,7 @@ gitlab:assets:compile:
     - webpack-report/
 
 karma:
-  image: pixelcog/gitlab:chrometest
+  image: "dev.gitlab.org:5005/gitlab/gitlab-build-images:ruby-2.3.3-golang-1.8-git-2.7-chrome-59.0-node-7.1-postgresql-9.6"
   stage: test
   <<: *use-pg
   <<: *dedicated-runner