DB/Creature: Remove no longer needed Summon Imp quests

Closes #12557
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore into ghbb
DB/Creature: Update to c1006c5

It's bad to do things at late night.
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore into ghbb
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
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore

Conflicts:
	.travis.yml
	src/server/scripts/Northrend/AzjolNerub/Ahnkahet/boss_elder_nadox.cpp
	src/server/scripts/Northrend/IcecrownCitadel/boss_festergut.cpp
	src/server/scripts/Northrend/IcecrownCitadel/boss_rotface.cpp
Scripts/ICC: Fix non-pch build
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore into ghbb
Merge branch 'master' of https://github.com/TrueWoW/TrinityCore into ghbb

Conflicts:
	.travis.yml
	src/server/scripts/Northrend/IcecrownCitadel/boss_festergut.cpp
	src/server/scripts/Northrend/IcecrownCitadel/boss_rotface.cpp