Creates a Savings Product
Mandatory Fields: name, shortName, description, currencyCode, digitsAfterDecimal,inMultiplesOf, nominalAnnualInterestRate, interestCompoundingPeriodType, interestCalculationType, interestCalculationDaysInYearType,accountingRule
Mandatory Fields for Cash based accounting (accountingRule = 2): savingsReferenceAccountId, savingsControlAccountId, interestOnSavingsAccountId, incomeFromFeeAccountId, transfersInSuspenseAccountId, incomeFromPenaltyAccountId
Optional Fields: minRequiredOpeningBalance, lockinPeriodFrequency, lockinPeriodFrequencyType, withdrawalFeeForTransfers, paymentChannelToFundSourceMappings, feeToIncomeAccountMappings, penaltyToIncomeAccountMappings, charges, allowOverdraft, overdraftLimit, minBalanceForInterestCalculation,withHoldTax,taxGroupId