Core/Scripts: Prevent double call to mob_acolyte_of_shadronAI::Reset() which applies encounter-related aura´s to certain creatures. Reset() was called from AIM_Initialize and prior to that the AI factory selector

Update issue #5152
Please try to re-reproduce

--HG--
branch : trunk

src/server/scripts/Northrend/ObsidianSanctum/boss_sartharion.cpp

@@ -1324,7 +1324,6 @@ public:
         mob_acolyte_of_shadronAI(Creature* pCreature) : ScriptedAI(pCreature)
         {
             pInstance = pCreature->GetInstanceScript();
-            Reset();
         }
 
         InstanceScript* pInstance;
@@ -1349,7 +1348,8 @@ public:
                     if (pTarget)
                         pTarget->AddAura(SPELL_GIFT_OF_TWILIGTH_SHA, pTarget);
                 }
-             }
+            }
+            
             me->AddAura(SPELL_TWILIGHT_SHIFT_ENTER,me);
         }