#10 Hardcode values in Market.properties

[Goutham Bharadwaj]

Some Markets (e.g NASDAQ) do not have all fields in the
reuters quote, (e.g 55 for LotSize) as these are fixed
for the exchange and do not vary b/w stocks. (Lotsize =
1 for all stocks on NASDAQ)
make Fields hardcode-able in market.properties
i.e for eg LOT_SIZE=!1 (anything starting with "!" will be
considered as hardcode value and will not be subscribed
to from reuters.)