Reschedule pipeline stages migration to run it again

db/post_migrate/20180212101928_schedule_build_stage_migration.rb

 class ScheduleBuildStageMigration < ActiveRecord::Migration
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-  MIGRATION = 'MigrateBuildStage'.freeze
-  BATCH_SIZE = 500
-
-  disable_ddl_transaction!
-
-  class Build < ActiveRecord::Base
-    include EachBatch
-    self.table_name = 'ci_builds'
-  end
+  ##
+  # This migration has been rescheduled to run again, see
+  # `20180405101928_reschedule_builds_stages_migration.rb`
+  #
 
   def up
-    disable_statement_timeout
-
-    Build.where('stage_id IS NULL').tap do |relation|
-      queue_background_migration_jobs_by_range_at_intervals(relation,
-                                                            MIGRATION,
-                                                            5.minutes,
-                                                            batch_size: BATCH_SIZE)
-    end
+    # noop
   end
 
   def down

db/post_migrate/20180405101928_reschedule_builds_stages_migration.rb

+class RescheduleBuildsStagesMigration < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  ##
+  # Rescheduled `20180212101928_schedule_build_stage_migration.rb`
+  #
+
+  DOWNTIME = false
+  MIGRATION = 'MigrateBuildStage'.freeze
+  BATCH_SIZE = 500
+
+  disable_ddl_transaction!
+
+  class Build < ActiveRecord::Base
+    include EachBatch
+    self.table_name = 'ci_builds'
+  end
+
+  def up
+    disable_statement_timeout
+
+    Build.where('stage_id IS NULL').tap do |relation|
+      queue_background_migration_jobs_by_range_at_intervals(relation,
+                                                            MIGRATION,
+                                                            5.minutes,
+                                                            batch_size: BATCH_SIZE)
+    end
+  end
+
+  def down
+    # noop
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20180327101207) do
+ActiveRecord::Schema.define(version: 20180405101928) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"

spec/migrations/schedule_build_stage_migration_spec.rb → spec/migrations/reschedule_builds_stages_migration_spec.rb

 require 'spec_helper'
-require Rails.root.join('db', 'post_migrate', '20180212101928_schedule_build_stage_migration')
+require Rails.root.join('db', 'post_migrate', '20180405101928_reschedule_builds_stages_migration')
 
-describe ScheduleBuildStageMigration, :sidekiq, :migration do
+describe RescheduleBuildsStagesMigration, :sidekiq, :migration do
   let(:projects) { table(:projects) }
   let(:pipelines) { table(:ci_pipelines) }
   let(:stages) { table(:ci_stages) }