Account "Premium Interest Rate"; changes made for Floating Rate Loans

Floating Rate Loans need to hold both the "Net" Interest Rate and the "Premium" Interest Rate.

Revolving Credit Loans using a Rate Table only need to hold the "Premium" Interest Rate above/ below the Rate Table. Previously in some objects, eg finAccountCalculation, the Premium rate was store in the InterestRate property - in others, eg AccountHistoryItem it was stored in InterestRatePremium property.

Changes:

Floating Rate Loans store the "Net" rate in the "InterestRate" property and the "Premium" Rate in the "InterestRatePremium" property.

Revolving Credit Loans store the Premium rate in the "InterestRatePremium" property. InterestRate property should be zero, or in some cases that actually charged, ie the Net Rate.