Bank Account Enquiries; updated functionality and standardise where applicable

Bank Account Enquiry helper functions in the finPOWER Connect Business Layer have been updated and standardised where applicable.

Changes include:

1. Added finClientFunctions.GetLatestBankAccountEnquiry2.

2. Obsoleted finClientFunctions.GetLatestBankAccountEnquiry and finClientFunctions.GetLatestSuccessfulBankAccountEnquiry.

3. Updated AccountAppFunctions.GetLatestBankAccountEnquiry.

Note, this is flagged as a breaking change, but only the AccountAppFunctions.GetLatestBankAccountEnquiry function has changed - and Account Applications are in beta release only.