[TALENT] Improved consecration aura

[Zimon]

UDB 0.12.0 (390) for MaNGOS 9763 with SD2 SQL for rev. 1677.

http://www.wowhead.com/spell=20256

Increases the effect of your Concentration Aura by an additional 15% and while any Aura is active reduces the duration of any Silence or Interrupt effect used against an affected group member by 30%. The duration reduction does not stack with any other effects.

BUG: aura doesn't reduces duration of interrupt and silience effect.