Core: Move FormationMgr to namespace

Also...
- Warning fixes
- Make Singleton constructors private

src/server/game/Globals/ObjectAccessor.h

@@ -86,13 +86,13 @@ class ObjectAccessor
 {
     friend class ACE_Singleton<ObjectAccessor, ACE_Thread_Mutex>;
     friend class WorldRunnable;
-    ObjectAccessor();
-    ~ObjectAccessor();
-    ObjectAccessor(const ObjectAccessor&);
-    ObjectAccessor& operator=(const ObjectAccessor&);
+    private:
+        ObjectAccessor();
+        ~ObjectAccessor();
+        ObjectAccessor(const ObjectAccessor&);
+        ObjectAccessor& operator=(const ObjectAccessor&);
 
     public:
-
         typedef UNORDERED_MAP<uint64, Corpse*> Player2CorpsesMapType;
         typedef UNORDERED_MAP<Player*, UpdateData>::value_type UpdateDataValueType;
 

src/server/game/Globals/ObjectMgr.h

@@ -1191,8 +1191,7 @@ class ObjectMgr
         void LoadFactionChangeSpells();
         void LoadFactionChangeReputations();
 
-    protected:
-
+    private:
         // first free id for selected id type
         uint32 m_auctionid;
         uint64 m_equipmentSetGuid;