DB/Creature: Onyxia's immunities

* Add immunity to interript effects
* Remove immunity to taunt effects as that was only valid for the classic version

sql/updates/world/2014_11_20_04_world.sql

@@ -0,0 +1,2 @@
+--
+UPDATE `creature_template` SET `mechanic_immune_mask` = `mechanic_immune_mask` |33554432, `flags_extra` = `flags_extra` &~256  WHERE entry IN (10184, 36538);