MuonSelectorTools: Comply with ATLAS naming conventions.

See merge request !4626

DataModelRunTests: A few more patterns to ignore.

See merge request !4628

HforTool: Missing dependency.

See merge request !4625

TrkTrackSummaryTool: Fix compilation warnings.

See merge request !4622

AthenaHiveEventLoopMgr: invalidate EventContext once outside of alg exec loop

See merge request !4592

Sweeping !4567 from 21.0 to master.
BunchCrossingTool Run 2 Defaults Update, 21.0 branch, (2017.09.11.)

See merge request !4596

TrigEgammaHypo: cmake fix.

See merge request !4617

DerivationFrameworkInDet: Fix compilation warning.

See merge request !4620

AthenaRootComps: Change tests to work under ctest.

See merge request !4613

Ignore a couple messages that depend on environment settings.

Local variables should not start with m_.

cmake fix: missing dependency on TruthUtils in cmake file.

Compilation warnings: unused variables.

Compilation warning: unused variable.

Add missing link dependency.
Fixes dbg build failure.

Change tests to work under ctest, rather than only with ATN.
Break up some of the tests so that they can run in parallel.
Should fix ATN test failure in the process.

External Cache for InDetPrepRawDataFormation classes

See merge request !4450

Sweeping !4580 from 21.0 to master.
Adding new bunch pattern to check 8be4 fill pattern

See merge request !4598

Changes to avoid irreproducibilities for truth-based CTIDE emulation (ATLASRECTS-3980)

See merge request !4522

Manual sweep of  !4061 and !4424 into master: FastCaloSimParamAction improvements

See merge request !4605

Cleaned-up `CaloHitAna`. Reduced `CaloHitAna` memory usage.

See merge request !4606

MCP-Muon efficiency release 21 pre-recommendations

See merge request !4573

Make isolation builder use Decorators

See merge request !4581

Remove hard coding of ATLAS+IBL geometry

See merge request !4571

Cherry pick 78611405ef master

See merge request !4527

Sweeping !4520 from 21.0 to master.
Extended DRAW_BCIDx support for up to four separate output streams

See merge request !4557

Fixing of uninitialized member variables (const and int) [Coverity issue# 108887]

See merge request !4563

Sweeping !4562 from 21.0 to master.
LW hist fix reverse

See merge request !4594

Sweeping !4442 from 21.0 to master.
Update exec_athena_art_trigger_validation.sh to send athena output to the grid log

See merge request !4597

ByteStreamCnvSvc: Removing references to transientAddress().

See merge request !4587

OutputStreamAthenaPool: Removing references to transientAddress().

See merge request !4588

TrigT2CaloCommon: Don't try to access unconfigured TrigTimerSvc.

See merge request !4590

TrigT2CaloEgamma: Fix tests for unconfigured TrigTimerSvc handles.

See merge request !4591

Manual sweep to master: Move user actions to Geant4 base classes

See merge request !4565

Added functionality of Views linking (parent, child relation).

See merge request !4575

Use new-style properties to declare empty monitoring ToolHandle

See merge request !4583

Migrate MuonCombinedAlg to use handles

See merge request !4474

RDBAccessSvc: Fix clang warning.

See merge request !4586

This is a manual sweep of the changes from !3978 into `master`.
Added an option to enable/disable recording of g4hits. The reason
for these changes is to fix the memory problems that were present
in the previous version of the code. There were minor problems with
the initialisation of new branches for the output tree, there were
some vectors that weren't getting cleared after each loop, and
there were a couple of objects that weren't being used anymore
which took up too much memory.

The initialisation of branches has been moved to the header file,
lines have been added to the source file to clean the vectors after
each loop and the unnecessary objects that accounted for most of the
memory problems have been removed.