Merge branch 'rails5-enum-pipeline-check' into 'master'

Fix auto_cancel_pending_pipelines check

Closes #47834

See merge request gitlab-org/gitlab-ce!19820

app/models/project.rb

@@ -2019,6 +2019,10 @@ class Project < ActiveRecord::Base
   end
   request_cache(:any_lfs_file_locks?) { self.id }
 
+  def auto_cancel_pending_pipelines?
+    auto_cancel_pending_pipelines == 'enabled'
+  end
+
   private
 
   def storage