[0164] Fixed quest 2701

* Fixed quest 2701 that is missing its completion text and is rewarded
by quest giver instead of specific gameobject
 which showed wrong gameobject behavior
 Source: http://www.wowhead.com/quest=2701#comments

* Added the gameobject 141980 (Spectral Lockbox) as the quest
completion GO
* Updated gameobject 141980 which had the wrong quest number reference
* Updated quest to remove completion emote as gameobject does not do
emote
* Removed quest completion from creature 7750 (Corporal Thund Splithoof)
This closes #27