Core/Dungeon Finder: Some optimizations

- Reduce core dependencies with LFGMgr
- Remove reduntant calculations in RoleCheck code
- Remove no longer needed functions
- Fix some packet data (Missing 0 when arrays were null)
- Add some debug msgs

closes issue 5042

--HG--
branch : trunk

src/server/game/Chat/Commands/Level3.cpp

@@ -57,7 +57,6 @@
 #include "Transport.h"
 #include "WeatherMgr.h"
 #include "ScriptMgr.h"
-#include "LFGMgr.h"
 #include "CreatureTextMgr.h"
 #include "SmartAI.h"
 #include "Group.h"