allow instruments to be ignored when sampling in stack handler

Author: robcarver17

data/futures/csvconfig/rollconfig.csv

@@ -234,7 +234,7 @@ GOLD-HK,FGHJKMNQUVXZ,-5,1,FGHJKMNQUVXZ,17
 GOLD-JPN,GJMQVZ,-5,1,GJMQVZ,22
 GOLD-JPN_mini,GJMQVZ,-5,1,GJMQVZ,20
 GOLD-mini,GJMQVZ,-30,1,GJMQVZ,26
-GOLD_micro,GJMQVZ,-30,1,GJMQVZ,26
+GOLD_micro,GJMQVZ,-40,1,GJMQVZ,26
 HANG,FGHJKMNQUVXZ,-5,1,FGHJKMNQUVXZ,26
 HANG-DIV,Z,-250,-1,Z,26
 HANGTECH,FGHJKMNQUVXZ,-5,1,FGHJKMNQUVXZ,25