INFILTRATION: Corrected ns formula for infiltration rewards

In commit 
7c5097ee83 the author extracted the functionality for infiltration rewards into a NS function and made it accessible via formulas.

The exposed function does however not use the same input parameters as the Victory screen after infiltration since he uses the difficulty and not the starting difficulty.

Difficulty is clamped to [0;3], so the formulas api showed for high difficulty servers a vastly lower result.

src/NetscriptFunctions/Infiltration.ts

@@ -38,9 +38,9 @@ export function NetscriptInfiltration(): InternalAPI<IInfiltration> {
     return {
       location: JSON.parse(JSON.stringify(location)),
       reward: {
-        tradeRep: calculateTradeInformationRepReward(player, reward, maxLevel, difficulty),
-        sellCash: calculateSellInformationCashReward(player, reward, maxLevel, difficulty),
-        SoARep: calculateInfiltratorsRepReward(player, Factions[FactionNames.ShadowsOfAnarchy], difficulty),
+        tradeRep: calculateTradeInformationRepReward(player, reward, maxLevel, startingSecurityLevel),
+        sellCash: calculateSellInformationCashReward(player, reward, maxLevel, startingSecurityLevel),
+        SoARep: calculateInfiltratorsRepReward(player, Factions[FactionNames.ShadowsOfAnarchy], startingSecurityLevel),
       },
       difficulty: difficulty,
     };