Core/Maps: Unload transports in MapManager::UnloadAll instead of singleton destructor.

Core/Transports: Properly delink units from transports on transport desutruction. - Thanks to Shauren for help.
Core/ObjectAccessor: Unload corpse 'storage' in added UnloadAll method called in WorldRunnable postservice hook.
Core/Master: Change some postservice queries to syncrhonous (direct) execution to ensure execution on shutdown
Core/Master: Remove redundant calls to ACE::init and ACE::fini

These changes were made to fix crash/freeze issues on shutdown.

src/server/game/Globals/ObjectAccessor.cpp

@@ -45,11 +45,6 @@ ObjectAccessor::ObjectAccessor()
 
 ObjectAccessor::~ObjectAccessor()
 {
-    for (Player2CorpsesMapType::const_iterator itr = i_player2corpse.begin(); itr != i_player2corpse.end(); ++itr)
-    {
-        itr->second->RemoveFromWorld();
-        delete itr->second;
-    }
 }
 
 WorldObject* ObjectAccessor::GetWorldObject(WorldObject const& p, uint64 guid)
@@ -385,6 +380,15 @@ void ObjectAccessor::Update(uint32 /*diff*/)
     }
 }
 
+void ObjectAccessor::UnloadAll()
+{
+    for (Player2CorpsesMapType::const_iterator itr = i_player2corpse.begin(); itr != i_player2corpse.end(); ++itr)
+    {
+        itr->second->RemoveFromWorld();
+        delete itr->second;
+    }
+}
+
 /// Define the static members of HashMapHolder
 
 template <class T> UNORDERED_MAP< uint64, T* > HashMapHolder<T>::m_objectMap;