DataQualityUtils: cmake fixes

See merge request atlas/athena!35149

Remove references to unused files.

Externals Update, master branch (2020.07.27.)

Closes ATLINFR-3652

See merge request atlas/athena!35122

add a unit test for AsgDataHandles

See merge request atlas/athena!35077

Continues to move tests from TrigUpgraTest to better suited packages

See merge request atlas/athena!34995

ART test for DQ on cosmics

See merge request !34979

TrigT1: Fixes for thread checker

See merge request atlas/athena!35000

TrigValTools: Add rootcomp unit test and cleanup

See merge request atlas/athena!35037

Migration of the last portion of GeneratorFilters to HepMC3

See merge request atlas/athena!35044

Add more muon triggers to LS2 menu

See merge request atlas/athena!35045

Remove boilerplate code from BTagging and FlavorTagDiscriminants

See merge request atlas/athena!35084

Fix for Error in "from ValkyrieConf import ValgrindSvc as _ValgrindSvc" (Python3)

See merge request atlas/athena!35091

Cleanup of muon packages

See merge request atlas/athena!35093

Cleanup of AtlasHepMC.

See merge request atlas/athena!35097

Fix some thread-safety warnings in MuonGeoModel

Closes ATLASRECTS-5255

See merge request atlas/athena!35098

GSFTrackExtrapolator  : Use unordered set

See merge request atlas/athena!35116

PerfMonVTune: Python3 fix for importing VTuneProfilerService

See merge request atlas/athena!35119

FlavorTagDiscriminants: Fix clang warnings.

See merge request atlas/athena!35102

TriggerMenuMT: Deprecation fix.

See merge request atlas/athena!35103

D3PDMakerCoreComps: Fix for getting DVLInfo.

See merge request atlas/athena!35104

OutputStreamAthenaPool: python 3 fixes

See merge request atlas/athena!35105

xAODMetaDataCnv: Fix clang warnings.

See merge request atlas/athena!35106

EventBoost: Fix uninitialized properties.

See merge request atlas/athena!35107

TrkEventUtils: Fix uninitialized variable warnings.

See merge request atlas/athena!35108

TRT_CalibTools: cmake fixes

See merge request atlas/athena!35109

TrigT2CaloCommon: cmake fix

See merge request atlas/athena!35110

TrigL2MuonSA: cmake fix

See merge request atlas/athena!35112

TrkAlignGenTools+TrkAlignGenAlgs: cmake fixes

See merge request atlas/athena!35113

PixelDigitization: Conditions dependency fixes

See merge request atlas/athena!35115

At the same time, since the new tag uses LCG_97apython3_ATLAS_1 by default
for all LCG based projects, removed the overrides from the build_externals.sh
scripts of all projects for forcing the usage of LCG_97a_ATLAS_1.

Also updated the Athena configuration to use the TDAQ installations compatible
with Python 3 instead of Python 2.7, and removed the NumPy environment setup
from the project. Since with LCG_97a we don't need that anymore.

Don't declare dependencies on conditions objects that we won't read.
(This is for the old configuration.  The new-style configuration should
already be ok.)

Library dependency fixes.

Library dependency fixes.

Remove use of EIGEN_INCLUDE_DIRS.
find_package was missing, and we anyway don't have a direct dependency
on Eigen.

Missing find_package for TBB.