Core/Scripting: Some boss script fixes.

-TrinityCore
Core/Scripting: Runes in UBRS Dragonspire Hall now activate and open …

...door
-TrinityCore
Core/Scripting: Fix warning

-TrinityCore
Core/Scripting: UBRS Boss Pyroguard Emberseer closer to being fully s…

…cripted.
-TrinityCore