Simulated order should be rejected if min_fill_size is greater than requested size

[mzaja]

If FILL_OR_KILL order's (requested) size is lower than min_fill_size, Flumine simulation behaves as if min_fill_size == size. However, the order should be rejected with INVALID_MIN_FILL_SIZE error code, as per: https://docs.developer.betfair.com/display/1smk3cen4v3lu3yomq5qye0ni/Betting+Enums#BettingEnums-InstructionReportErrorCode