Eluna implementation (#847)

* azerothcore + eluna done.

* Remove the Eluna single thread limit.

* Read Eluna Settings file.

* submodule change.

* fix(test)  Ubuntu - Cant Link Library after Compile

* The ELUNA is disabled by default.

* remove submodule luaEngine.

* some change

* fix a error

* change cmake

* fix: some onplayerchat does not have hooks.

* Eluna: Add BG event Hooks.

* fix:cmake hook AFTER_LOAD_CONF not work.

* Remove the eluna switch.

* Remove some define in the core.

* fix conf file not read in the linux.

* eluna : change bg hook parameter type

* Remove TC log function call

* change bg hook OnBGEnd parameter type.


Note: to enable Eluna, the module is required

src/server/worldserver/WorldThread/WorldRunnable.cpp

@@ -22,6 +22,10 @@
 #include "AvgDiffTracker.h"
 #include "AsyncAuctionListing.h"
 
+#ifdef ELUNA
+#include "LuaEngine.h"
+#endif
+
 #ifdef _WIN32
 #include "ServiceWin32.h"
 extern int m_ServiceStatus;
@@ -76,6 +80,9 @@ void WorldRunnable::run()
     sObjectAccessor->UnloadAll();             // unload 'i_player2corpse' storage and remove from world
     sScriptMgr->Unload();
     sOutdoorPvPMgr->Die();
+#ifdef ELUNA
+    Eluna::Uninitialize();
+#endif
 }
 
 void AuctionListingRunnable::run()