DB/Loot: Rework skinning_loot_template definitions, removing the horrible definitions ripped from wowhead and replacing them with a proper defined set of loot

Closes #10610
DB/Loot: make sure to update & delete the right templates, updated file!
SQL: Fix fail in 7facda2002e80401ce71ab7562042293eba62ad6
DB/Misc: Fix startup errors & typo
Core/Objects: Removed obsolete code
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore