Core/Logging: Fix mem leak. Thanks to @Sar777 for the report
Core/Misc: Remove devel log msg that shouldn't have been commited
Core/Vehicles: Also remove mount auras for passengers not in charm seat

May fix related crashes:
Ref #9256 #9255
Merge branch 'master' of github.com:TrinityCore/TrinityCore into 4.3.4