Merge branch 'unify-project_features_apply_to_issuables_shared_examples.rb' into 'master'

Unify spec/support/shared_examples/features/project_features_apply_to_issuables_shared_examples.rb

See merge request gitlab-org/gitlab-ce!20073

spec/support/shared_examples/features/project_features_apply_to_issuables_shared_examples.rb

@@ -18,7 +18,7 @@ shared_examples 'project features apply to issuables' do |klass|
 
   before do
     _ = issuable
-    gitlab_sign_in(user) if user
+    sign_in(user) if user
     visit path
   end