Core/Globals: some changes in quest loading

- Made load/reload associated quest tables data-driven, so removed a bunch of similar looking code from ObjectMgr (yay!)
- Codestyle and encapsulation for ExclusiveQuestGroups

src/server/game/Globals/ObjectMgr.h

@@ -596,6 +596,9 @@ typedef std::multimap<uint32, uint32> QuestRelationsReverse; // quest -> unit/go
 typedef std::pair<QuestRelations::const_iterator, QuestRelations::const_iterator> QuestRelationBounds;
 typedef std::pair<QuestRelationsReverse::const_iterator, QuestRelationsReverse::const_iterator> QuestRelationReverseBounds;
 
+typedef std::multimap<int32, uint32> ExclusiveQuestGroups; // exclusiveGroupId -> quest
+typedef std::pair<ExclusiveQuestGroups::const_iterator, ExclusiveQuestGroups::const_iterator> ExclusiveQuestGroupsBounds;
+
 struct PlayerCreateInfoItem
 {
     PlayerCreateInfoItem(uint32 id, uint32 amount) : item_id(id), item_amount(amount) { }
@@ -1125,6 +1128,11 @@ class TC_GAME_API ObjectMgr
             return _creatureQuestInvolvedRelationsReverse.equal_range(questId);
         }
 
+        ExclusiveQuestGroupsBounds GetExclusiveQuestGroupBounds(int32 exclusiveGroupId) const
+        {
+            return _exclusiveQuestGroups.equal_range(exclusiveGroupId);
+        }
+
         bool LoadTrinityStrings();
 
         void LoadEventScripts();
@@ -1261,11 +1269,6 @@ class TC_GAME_API ObjectMgr
         Trinity::IteratorPair<SpawnGroupLinkContainer::const_iterator> GetSpawnDataForGroup(uint32 groupId) const { return Trinity::Containers::MapEqualRange(_spawnGroupMapStore, groupId); }
         std::vector<InstanceSpawnGroupInfo> const* GetSpawnGroupsForInstance(uint32 instanceId) const { auto it = _instanceSpawnGroupStore.find(instanceId); return it != _instanceSpawnGroupStore.end() ? &it->second : nullptr; }
 
-        typedef std::multimap<int32, uint32> ExclusiveQuestGroups;
-        typedef std::pair<ExclusiveQuestGroups::const_iterator, ExclusiveQuestGroups::const_iterator> ExclusiveQuestGroupsBounds;
-
-        ExclusiveQuestGroups mExclusiveQuestGroups;
-
         MailLevelReward const* GetMailLevelReward(uint32 level, uint32 raceMask) const
         {
             MailLevelRewardContainer::const_iterator map_itr = _mailLevelRewardStore.find(level);
@@ -1623,6 +1626,8 @@ class TC_GAME_API ObjectMgr
         QuestRelations _creatureQuestInvolvedRelations;
         QuestRelationsReverse _creatureQuestInvolvedRelationsReverse;
 
+        ExclusiveQuestGroups _exclusiveQuestGroups;
+
         //character reserved names
         typedef std::set<std::wstring> ReservedNamesContainer;
         ReservedNamesContainer _reservedNamesStore;