Suspend expired services of test instances (a test instance = instance without template neither standard invoice) if it is not a redirect instance and if we are after the planned end date (+ grace offset in SELLYOURSAAS_NBDAYS_AFTER_EXPIRATION_BEFORE_TRIAL_SUSPEND). Note that if a payment mode exists for customer, we do NOT suspend instance but create a template invoice instead. 1st parameter can be set to 1 to disable apache reload. 2nd parameter is maximum number of instance to suspend.