[12492] Fix spell 61254

* Also rearrange code for Aura::HandleAuraModIncreaseHealth
* Fix some behaviour with SetHealth/SetPower if set to max health/power

Conflicts:
	src/game/SpellAuras.cpp
[12493] Fix (at least) two false positive startup errors

* Fix startup-error related to quest 10162
* Fix startup-error for spell 53821
[12495] Implement some spells for Ahune encounter

Spell entries: 46371, 46372 and 46430

Conflicts:
	src/game/Spell.cpp
	src/game/SpellEffects.cpp
	src/shared/revision_nr.h
[12498] Fix a typo for spell 37096

Signed-off-by: Schmoozerd <schmoozerd@cmangos.net>
SD2 update