Quik broker: adjust timestamp (MSK -> UTC)

Currently, trans2quik callback is called with MSK timestamps, so
production trades receive MSK timestamp. On the other hand,
PaperBroker sets UTC timestamps. For consistency all trade timestamps
should be in one timezone, that is, UTC.

src/Broker/QuikBroker/Trans2QuikApi.hs

@@ -526,8 +526,9 @@ defaultTradeCb state mode dnumber orderNum classCode secCode price qty value sel
         qtSell = sell == 1,
         qtVolume = toDouble value,
         qtVolumeCurrency = currency,
-        qtTimestamp = mkTimestamp ymd hms us
+        qtTimestamp = adjustTimestamp $ mkTimestamp ymd hms us
       }
+      adjustTimestamp = addUTCTime (-3 * 3600) -- MSK -> UTC
       mkTimestamp ymd hms us = UTCTime (fromGregorian y mon d) (fromInteger (h * 3600 + m * 60 + s) + fromRational (us % 1000000))
         where
           y = ymd `div` 10000