Merge branch 'blackst0ne-rails5-replace-true-values-with-false-values' into 'master'

[Rails5] Add FALSE_VALUES constant to Service#boolean_accessor

See merge request gitlab-org/gitlab-ce!18240

app/models/service.rb

@@ -206,7 +206,11 @@ class Service < ActiveRecord::Base
     args.each do |arg|
       class_eval %{
         def #{arg}?
-          ActiveRecord::ConnectionAdapters::Column::TRUE_VALUES.include?(#{arg})
+          if Gitlab.rails5?
+            !ActiveModel::Type::Boolean::FALSE_VALUES.include?(#{arg})
+          else
+            ActiveRecord::ConnectionAdapters::Column::TRUE_VALUES.include?(#{arg})
+          end
         end
       }
     end