X aodp flow atljetmet 834 nov18 v2

See merge request atlas/athena!16782

Sweeping !16708 from 21.0 to master.
Construct TFCSTruthState with negative mass for anti protons and anti neutrons

See merge request atlas/athena!16773

Retiring BeamSpotSvc commit 5 (ATLASRECTS-4042)

See merge request atlas/athena!16781

Make trying to merge None a fatal error

See merge request atlas/athena!16758

Configure muFast step in new job option way, ATR-16944

See merge request atlas/athena!15996

Fixed compilation problem of DataModelTestDataCommon/CondAlg2

See merge request atlas/athena!16793

Renamed execute_r with execute, as it was done for many algorithms in !16365

Better memory managment in combined muon algorithms

See merge request atlas/athena!16596

Correct TRT tuning for Overlay jobs

See merge request atlas/athena!16653

AthenaKernel+others: Support mixed conditions containers.

See merge request atlas/athena!16662

Delete PixelOfflineCalibSvc (ATLASRECTS-4627)

See merge request atlas/athena!15652

PixelConditionsTools: Fix circular dependency with PixelConditionsServices.

See merge request atlas/athena!16768

HLT navigation dump

See merge request atlas/athena!14699

Sweeping !16710 from 21.0 to master.
Update the HI CMR to run 365678

See merge request atlas/athena!16772

athenaHLT.py: Add --concurrent-events arg and use DFDcmEmuBackend

See merge request atlas/athena!16760

AthenaPoolServices: Fix clang warning.

See merge request atlas/athena!16766

TrkParticleCreator: Fix clang warnings.

See merge request atlas/athena!16765

tauRecTools: Fix clang warnings.

See merge request atlas/athena!16764

Update packages:TrigJetMonitoring  from upstream/21.1 to upstream/master via pseudo-merge

See merge request atlas/athena!16753

LArTools: Fix cmake file.

See merge request atlas/athena!16767

added diff functionality, removed conversion to pickle

See merge request atlas/athena!16750

Adding DoubleEventSelector

See merge request atlas/athena!16711

Stream aux variables to HLT result

See merge request atlas/athena!16156

Externals Update, master branch (2018.12.13.)

See merge request atlas/athena!16756

Cleaning and merging common parts of InputMakerBase and EventViewCreator

See merge request atlas/athena!16280

Fixing links between output and input decisions in b-jet code

See merge request atlas/athena!16712

Removing a few final examples of (slightly) inappropriate language

See merge request atlas/athena!16752

Add the ability to disable the beamspot in xAODEventInfoCnv (Removing it is too disruptive at this time)

TileSimUtils: Remove unneeded dependencies on CLIDSvc and SGTools.

See merge request atlas/athena!16749

GenAnalysisTools: Fix gcc9 warnings.

See merge request atlas/athena!16746

MuonMM_CnvTools: Remove unneeded dependencies on CLIDSvc and SGTools.

See merge request atlas/athena!16748