Merge branch 'qa-quarantine-failing-push-mirror-repo-spec' into 'master'

Quarantine failing push_mirroring_over_http_spec

See merge request gitlab-org/gitlab-ce!25590

(cherry picked from commit 68b1ed92)

141c5e4e Quarantine failing spec

qa/qa/specs/features/browser_ui/3_create/repository/push_mirroring_over_http_spec.rb

 # frozen_string_literal: true
 module QA
-  context 'Create' do
+  # https://gitlab.com/gitlab-org/quality/staging/issues/40
+  context 'Create', :quarantine do
     describe 'Push mirror a repository over HTTP' do
       it 'configures and syncs a (push) mirrored repository' do
         Runtime::Browser.visit(:gitlab, Page::Main::Login)