Accommodate multiple collections with ReadHandle

When working with two collections -- one for hard-scatter and another for pile-up -- we need to look at different StoreGates. Previously, when the AthAlgTool::EvtStore property was overridden in JOs, this would also effect the global SG key.

This patch ensures that the TruthEvent is retrieved from the default StoreGate instance -- i.e. that named StoreGateSvc -- rather than the OriginalEvent_SG when using multiple collections.

added 21.3 Simulation Test labels

This merge request affects 1 package:

• Simulation/G4Atlas/G4AtlasTests

Adding @jchapman ,@vpascuzz as watchers

added review-pending-level-1 label

added 67 commits

• 45603677...65dd7228 - 64 commits from branch atlas:21.3
• bda2def4 - Accommodate multiple collections with ReadHandle
• cc52215f - Update format/indentation
• ef42d333 - Merge branch '21p3.MuonHitTestToolBase-ReadHandle' of...

Compare with previous version

This merge request affects 1 package:

• Simulation/G4Atlas/G4AtlasTests

Adding @jchapman ,@vpascuzz as watchers

mentioned in merge request !31179 (merged)

CI Result SUCCESS (hash 45603677)

	Athena
externals
cmake
make
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optional tests

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Athena: number of compilation errors 0, warnings 11
For experts only: Jenkins output [CI-MERGE-REQUEST 43034]

CI Result SUCCESS (hash cc52215f)

	Athena
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST 43036]

resolved all threads

added review-user-action-required label and removed review-pending-level-1 label

Once you reply @vpascuzz, please feel free to re-add the review-pending-level-1 label to bring a shifter back through.

MLB (L1)

added 7 commits

• cc52215f...16f8c2c2 - 4 commits from branch atlas:21.3
• b28d815f - Accommodate multiple collections with ReadHandle
• 5ab467ef - Update format/indentation
• 0676e474 - Remove commented code

Compare with previous version

resolved all threads

added review-pending-level-1 label

removed review-user-action-required label

This merge request affects 1 package:

• Simulation/G4Atlas/G4AtlasTests

Adding @jchapman ,@vpascuzz as watchers

CI Result SUCCESS (hash 0676e474)

	Athena
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 158
For experts only: Jenkins output [CI-MERGE-REQUEST 43055]

added review-approved label and removed review-pending-level-1 label

Looks good, approving.

Serhat (L1)

merged

mentioned in commit 7da5c77e

mentioned in commit 9b8db2b6

added sweep:ignore label

mentioned in merge request !31887 (merged)

mentioned in commit a2a70552