Fix missing dossier_id on champs inside repetition

lib/tasks/deployment/20190418144354_add_missing_dossier_id_to_repetitions.rake

@@ -0,0 +1,18 @@
+namespace :after_party do
+  desc 'Deployment task: add_missing_dossier_id_to_repetitions'
+  task add_missing_dossier_id_to_repetitions: :environment do
+    puts "Running deploy task 'add_missing_dossier_id_to_repetitions'"
+
+    champs = Champ.where(dossier_id: nil)
+    progress = ProgressReport.new(champs.count)
+    champs.find_each do |champ|
+      champ.update_column(:dossier_id, champ.parent.dossier_id)
+      progress.inc
+    end
+    progress.finish
+
+    # Update task as completed.  If you remove the line below, the task will
+    # run with every deploy (or every time you call after_party:run).
+    AfterParty::TaskRecord.create version: '20190418144354'
+  end
+end