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/game/Spells/Auras/SpellAuraEffects.cpp

@@ -28,6 +28,9 @@
 #include "Pet.h"
 #include "ReputationMgr.h"
 #include "InstanceScript.h"
+#ifdef ELUNA
+#include "LuaEngine.h"
+#endif
 
 class Aura;
 //
@@ -6023,6 +6026,11 @@ void AuraEffect::HandlePeriodicTriggerSpellWithValueAuraTick(Unit* target, Unit*
         }
     }
     else {
+#ifdef ELUNA
+        Creature* c = target->ToCreature();
+        if (c && caster && !sEluna->OnDummyEffect(caster, GetId(), SpellEffIndex(GetEffIndex()), target->ToCreature()))
+            return;
+#endif
 #if defined(ENABLE_EXTRAS) && defined(ENABLE_EXTRA_LOGS)
         sLog->outDebug(LOG_FILTER_SPELLS_AURAS, "AuraEffect::HandlePeriodicTriggerSpellWithValueAuraTick: Spell %u has non-existent spell %u in EffectTriggered[%d] and is therefor not triggered.", GetId(), triggerSpellId, GetEffIndex());
 #endif