Scripts/Instance: The Stonecore: Corborus, Slabhide

To share some work... Scripts up to Slabhide. Source is sniff file @Aokromes sent me.
/home/travis/build/TrinityCore/TrinityCore/src/server/scripts/Maelstrom/Stonecore/boss_slabhide.cpp:136:36: warning:

unused parameter 'victim' [-Wunused-parameter]