Core/Maps: Moved object respawn time storage from global to map level. This removes unneccessary locking since all objects run within its map's thread.

src/server/game/Maps/MapManager.cpp

@@ -110,6 +110,7 @@ Map* MapManager::CreateBaseMap(uint32 id)
         else
         {
             map = new Map(id, i_gridCleanUpDelay, 0, REGULAR_DIFFICULTY);
+            map->LoadRespawnTimes();
         }
         i_maps[id] = map;
     }