Applying value added services

Test.java

      log.info("Generate bills for " + billsCount + " months.");
      log.info("Expiration date: " + expireDate);
      List<BillEntity> bills = planner.getNextBills(services, lastBill, billsCount, paymentDay, expireDate, installationTax);
      filterEmptyCharges(bills);

      /**
       * Apply value added services over generated bills.
       */
      vasManager.applyValueAddedServices(contract, bills);