dev/core#2493 Stop attempting to format money in the processor class

dev/core#2493 Stop attempting to format money in the processor class

We've said this is wrong before but it has survived until now because it seemed scarier to change it. However,
now the reverse seems true.

The value in amount should always be machine friendly and there are no known processors
that expect locale specific formatting.

On the other hand the format() function is intended to prepare money for DISPLAY which
is not what is going on here