Rework TileCellBuilderFromHit so that the process()
methods can be made const.

Working to make calo system reconstruction reentrant.

TrigT1CaloCalibTools+TrigT1CaloCalibToolInterfaces: Migrate to VarHandle.

See merge request !20679

InDetAlignmentMonitoring; Migrate IDAlignMonResiduals to VarHandle.

See merge request !20678

EventBookkeeperTools: VarHandle migration.

See merge request atlas/athena!20677

TrkExStraightLineIntersector: Preparing to make interfaces const.

See merge request !20676

TileByteStream: Update reference files.

See merge request !20675

TileRecUtils: Update reference files.

See merge request !20674

AthExHelloWorld: Enable thread-safety static checker.

See merge request !20667

METUtilities: Fix dependency propagation.

See merge request !20666

METReconstruction: Make MET tools private.

See merge request !20665

ZdcRec+ZdcAnalysis: Migrate to VarHandles.

See merge request !20664

PyDumper: Explicitly disable CaloRinger during event dumping.

See merge request !20662

TrkExUtils: Fix gcc9 warnings.

See merge request !20663

TileRec: Convert TileAANtuple to use handles.

See merge request !20661

TileMonitoring: Migrate to VarHandles.

See merge request !20660

StoreGate: Fix compilation warnings.

See merge request !20659

EventUtils: Remove use of IAsgSelection interfaces.

See merge request atlas/athena!20649

IL1CaloxAODOfflineTriggerTowerTools::initDatabase is never called,
and the concrete implementation is problematic for MT.
Remove it.

Migrate L1CaloTriggerTowerDecoratorAlg/L1CaloxAODOfflineTriggerTowerTools
to use Read/WriteHandle.  Make tool private.

Use ReadHandle to access SG data.

Change EventCounterAlg to use ReadHandle.

The tool was caching event information in member variables.
Rework to remove this caching, to allow the interfaces to eventually
be made const.
Results are identical, and this is not expected to have any significant
effect on performance.

Also changed CRLF line endings to LF.

Fix test failures in master.

Fix test failures in master.

Enable thread-safety static checker.

Try to fix irreproducibility in MT2 test.

HandleKeys must be declared as properties in order for dependencies
to propagate correctly.

Needed to get dependencies propagated from tools.

In C++11, implicit declarations of copy and assignment are deprecated if the
class has a user defined destructor or copy or assignment.  gcc9 now warns
about this by default.
Adjust to avoid the warning.

CaloRinger is on by default in RecExCommon, and doesn't obey the doWrite
switches.  Futher, it loads Athena libraries during job configuration,
which can lead to crashes in gcc8 builds.  Explicitly disable it.

Removing more direct access to SG.

Use ReadHandleKey to get dependencies propagated.

Needed for q431 --thread=1.

Compilation warnings: Don't use std::move in return.

PROCTools: Fix import of RunTier0TestsTools.

See merge request !20618

xAODEventInfo: Thread-safety fixes.

See merge request !20619

TileRecUtils: Make TileCellBuilder const-compatible.

See merge request !20620

FastCaloSim: Making FastShowerCellBuilderTool const.

See merge request !20621

TrkExStraightLineIntersector: Add a simple unit test.

See merge request !20624

DiTauRec: Migrate to using VarHandles.

See merge request !20625

Fix ATLASDQ-663

Closes ATLASDQ-663

See merge request !20637