[DB][Quest] Misc fixes 2

1) Return to resting, remove non repeatable flags which were making it so quest would only work for 1 player per server restart
2) Stop invisible NPC Rodin Quest Credit http://www.wowhead.com/npc=24889 from attacking players while trying to do return to resting
3) Fix phasing of crusader bridenbrad so is visible for a tale of valor
4) Drops of quest starter item metzens writings
5) Fix starting of event for Tirions Gambit