update rake tasks

.gitlab-ci.yml

@@ -108,8 +108,7 @@ setup-test-env:
   stage: prepare
   script:
     - npm install
-    - bundle exec rake webpack:compile
-    - bundle exec rake gitlab:assets:compile 2>/dev/null
+    - bundle exec rake gitlab:assets:compile
     - bundle exec ruby -Ispec -e 'require "spec_helper" ; TestEnv.init'
   artifacts:
     expire_in: 7d

lib/tasks/gitlab/assets.rake

@@ -3,6 +3,7 @@ namespace :gitlab do
     desc 'GitLab | Assets | Compile all frontend assets'
     task :compile do
       Rake::Task['assets:precompile'].invoke
+      Rake::Task['webpack:compile'].invoke
       Rake::Task['gitlab:assets:fix_urls'].invoke
     end