Handle migration from rails 4.2

debian/patches/0680-rails-5-migrations.patch

@@ -0,0 +1,20 @@
+--- a/db/migrate/20181027114222_add_first_day_of_week_to_user_preferences.rb
++++ b/db/migrate/20181027114222_add_first_day_of_week_to_user_preferences.rb
+@@ -1,6 +1,6 @@
+ # frozen_string_literal: true
+ 
+-class AddFirstDayOfWeekToUserPreferences < ActiveRecord::Migration
++class AddFirstDayOfWeekToUserPreferences < ActiveRecord::Migration[4.2]
+   DOWNTIME = false
+ 
+   def change
+--- a/db/migrate/20181028120717_add_first_day_of_week_to_application_settings.rb
++++ b/db/migrate/20181028120717_add_first_day_of_week_to_application_settings.rb
+@@ -1,6 +1,6 @@
+ # frozen_string_literal: true
+ 
+-class AddFirstDayOfWeekToApplicationSettings < ActiveRecord::Migration
++class AddFirstDayOfWeekToApplicationSettings < ActiveRecord::Migration[4.2]
+   include Gitlab::Database::MigrationHelpers
+   disable_ddl_transaction!
+ 

debian/patches/series

@@ -22,6 +22,7 @@
 0660-fix-gitlab-yml-path.patch
 0670-allow-doorkeepr-4_3.patch
 0680-rails-5_1.patch
+0680-rails-5-migrations.patch
 0685-bump-fog.patch
 0686-rails-5.1-embed.patch
 0687-opentracing-embed.patch