[0105] Updates start script for quests 68 & 74

* Removed end script for quest 67 (Legend of Stalvan) as it should occur
  at the start of next quest in line
* Moved script to next quest in line : 68 (Legend of Stalvan)
* Extended script to force spawned creature 2044 (Forlorn Spirit) to
attack player for quests 68 and 74