Add task to cleanup orphaned dossier_operation_logs

lib/tasks/deployment/20181128155650_destroy_orphaned_dossier_operation_logs.rake

@@ -0,0 +1,17 @@
+namespace :after_party do
+  desc 'Deployment task: destroy_orphaned_dossier_operation_logs'
+  task destroy_orphaned_dossier_operation_logs: :environment do
+    bar = RakeProgressbar.new(DossierOperationLog.count)
+
+    DossierOperationLog.find_each do |log|
+      if log.dossier.blank?
+        log.destroy
+      end
+      bar.inc
+    end
+
+    bar.finished
+
+    AfterParty::TaskRecord.create version: '20181128155650'
+  end
+end