CaloThinCellsByClusterAlg and isValid check for serial run. Trying to fix e/gamma ART

In egamma ART since 28/01/2020 we observe :

ESDtoAOD 12:59:39 CaloThinCellsByClusterAlg_InDetTrackParticlesAs...  FATAL  Standard std::exception is caught
ESDtoAOD 12:59:39 CaloThinCellsByClusterAlg_InDetTrackParticlesAs...  ERROR SG::ExcNullReadHandle: Dereference of read handle failed: StoreGateSvc_Impl+InDetTrackParticlesAssociatedClusters[1219821989]
ESDtoAOD 12:59:39 AthAlgSeq                                           FATAL  Standard std::exception is caught
ESDtoAOD 12:59:39 AthAlgSeq                                           ERROR SG::ExcNullReadHandle: Dereference of read handle failed: StoreGateSvc_Impl+InDetTrackParticlesAssociatedClusters[1219821989]
ESDtoAOD 12:59:39 AthAllAlgSeq                                        FATAL  Standard std::exception is caught
ESDtoAOD 12:59:39 AthAllAlgSeq                                        ERROR SG::ExcNullReadHandle: Dereference of read handle failed: StoreGateSvc_Impl+InDetTrackParticlesAssociatedClusters[1219821989]
ESDtoAOD 12:59:39 AthAlgEvtSeq                                        FATAL  Standard std::exception is caught
ESDtoAOD 12:59:39 AthAlgEvtSeq                                        ERROR SG::ExcNullReadHandle: Dereference of read handle failed: StoreGateSvc_Impl+InDetTrackParticlesAssociatedClusters[1219821989]
ESDtoAOD 12:59:39 AthMasterSeq                                        FATAL  Standard std::exception is caught
ESDtoAOD 12:59:39 AthMasterSeq                                        ERROR SG::ExcNullReadHandle: Dereference of read handle fail

Ths prb has more to do with !29831 (merged)

I do not readily see where we change det-flags (we do though doMuons=False).

Anyhow , this adds a check for "serial" running and gives a warning when the ReadHandle is not valid.

Mentioning @turra and @dboerner

This merge request affects 1 package:

• Calorimeter/CaloRec

Adding @pavol as watcher

added Calorimeter JetEtmiss master review-pending-level-1 labels

changed title from CaloThinCellsByClusterAlg and isValid check for serial run. Trying to fi to CaloThinCellsByClusterAlg and isValid check for serial run. Trying to fix e/gamma ART

changed the description

CI Result SUCCESS (hash d59a1e89)

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 9004]

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

merged

mentioned in commit f46cd7aa

added sweep:ignore label