[0507] Fixed some startup errors

* Synchronised mana of spawns with creature_template value for Qiraji
Slayer (creature 15250)
* Removed addon of previously delete duplicate spawns of Midsummer
Celebrant
* Deleted remaining duplicate spawns of Midsummer Celebrant
* Removed waypoints movement of two paired creatures in Molten Core as
they are static
* Moved the waypoints of one of this creature to the nearby Lava Surger
who should be wandering in their stead
* Fixed promotional items for the iCoke event
[0508] Added missing areatrigger relation in Uldaman

* Added missing areatrigger relation for quest 2240 (The Hidden
Chamber) in Uldaman
The quest is now completable
[0509] Fixed quest 2118
* Fixed quest 2118 (Plagued Lands) which had outdated required objectives (no longer in sync with SD2 script)
The quest is now completable
This closes #418 and closes #287

Signed-off-by: Cala Haryon <calaftp@free.fr>