[0880] Fixed gossip of NPC 13278 in Azshara

* Fixed gossip menu of creature 13278 (Duke Hydraxis) in Azshara. Now
players will be able to get the required items to summon Majordomo
Executus in Molten Core
Thanks Scotty0100 for reporting and doing serious research about it
Thanks Tobschinski for researching also
This closes #614
http://img.photobucket.com/albums/v672/Xandier/Forums/WoWScrnShot_052106
_111856.jpg
http://rsmg.pbsrc.com/albums/v672/Xandier/Forums/WoWScrnShot_052106_1118
28.jpg~c100