Merge branch 'fix/gb/fix-end-to-end-tests-timeouts' into 'master'

Fix timeouts of end-to-end tests with GitLab QA

Closes gitlab-qa#224

See merge request gitlab-org/gitlab-ce!18583

.gitlab-ci.yml

@@ -289,7 +289,6 @@ stages:
 # Trigger a package build in omnibus-gitlab repository
 #
 package-and-qa:
-  <<: *dedicated-runner
   image: ruby:2.4-alpine
   before_script: []
   stage: build