DB/Creature: Oglethorpe Obnoticus

By dr-j, closes #12315
DB/Misc: additions to a02ef421b15

By dr-j, closes #12590
DB/Creature: Remove no longer needed Summon Imp quests

Closes #12557
DB/Creature: Update to c1006c5

It's bad to do things at late night.
Core: Kill again whitespace :(
Core/GridNotifiers: Fixed a warning from Coverity
Core/PreparedStatements: Fixed a Coverity warning
Core/DatabaseWorkerPool: Delete PCQ in dtor rather than in Close() and cancel queue properly before doing so
Misc/Travis: Tune down the amount of parallel builds and disable PCH