[0400] Improved trash mobs in Outer Ring of Naxxramas Spider Wing

* Revamp trash mobs in the outer ring of Naxxramas Spider Wing
* Removed placeholders and spawns backported from WotLK version
* Added missing groups and spawns in outer ring
* Added patrols

Sources:
http://www.wowhead.com/npc=16446#comments
http://www.wowhead.com/npc=16447#comments
http://www.wowhead.com/npc=16448#comments
http://www.wowhead.com/npc=16449#comments
http://www.wowhead.com/npc=16451#comments
http://www.wowhead.com/npc=16452#comments
http://www.wowhead.com/npc=16453#comments
http://www.warcraftmovies.com/movieview.php?id=29663