override def getTransactions. No need for database lookups for params

[simonredfern]

override def getTransactions(bankId: BankId, accountId: AccountId, queryParams: OBPQueryParam*): Box[List[Transaction]] = {

// TODO Refactor this. No need for database lookups etc.
val limit = queryParams.collect { case OBPLimit(value) => MaxRows[MappedTransaction](value) }.headOption
val offset = queryParams.collect { case OBPOffset(value) => StartAt[MappedTransaction](value) }.headOption
val fromDate = queryParams.collect { case OBPFromDate(date) => By_>=(MappedTransaction.tFinishDate, date) }.headOption
val toDate = queryParams.collect { case OBPToDate(date) => By_<=(MappedTransaction.tFinishDate, date) }.headOption
val ordering = queryParams.collect {

.....

[constantine2nd]

@simonredfern Ready for testing.