add expiry for login

lib/tasks/clear_data.rake

@@ -16,6 +16,7 @@ namespace :clear do
     PaymentJournal.delete_all
     Survey.delete_all
     ProductCommission.delete_all
+    InDuty.delete_all
     DiningFacility.update_all(status:'available')
     CashierTerminal.update_all(is_currently_login: 0)
     SeedGenerator.where("id > 1").update(:current => 0, :next => 1)