Core/Errors: Stop using System.Diagnostics.Contracts, Its just closing the server without error or warning. We now log the error and then throw a exception

Source/Game/Garrisons/GarrisonManager.cs

@@ -21,7 +21,6 @@ using Game.DataStorage;
 using Game.Entities;
 using System;
 using System.Collections.Generic;
-using System.Diagnostics.Contracts;
 using System.Linq;
 
 namespace Game.Garrisons
@@ -173,7 +172,7 @@ namespace Game.Garrisons
         //todo check this method, might be slow.....
         public List<GarrAbilityRecord> RollFollowerAbilities(uint garrFollowerId, GarrFollowerRecord follower, uint quality, uint faction, bool initial)
         {
-            Contract.Assert(faction< 2);
+            Cypher.Assert(faction< 2);
 
             bool hasForcedExclusiveTrait = false;
             List<GarrAbilityRecord> result = new List<GarrAbilityRecord>();

Source/Game/Garrisons/Garrisons.cs

@@ -25,7 +25,6 @@ using Game.Maps;
 using Game.Network.Packets;
 using System;
 using System.Collections.Generic;
-using System.Diagnostics.Contracts;
 
 namespace Game.Garrisons
 {
@@ -426,7 +425,7 @@ namespace Game.Garrisons
                 {
                     // Restore previous level building
                     uint restored = Global.GarrisonMgr.GetPreviousLevelBuilding(constructing.BuildingType, constructing.UpgradeLevel);
-                    Contract.Assert(restored != 0);
+                    Cypher.Assert(restored != 0);
 
                     GarrisonPlaceBuildingResult placeBuildingResult = new GarrisonPlaceBuildingResult();
                     placeBuildingResult.GarrTypeID = GarrisonType.Garrison;