Fix crash occuring if MuonRoIContainerName is empty

Hi,

this MR fixes the issue risen in ATLASRECTS-5970. The problem appears if the MuonRoIContainerName is empty and no object is retrieved from the StoreGate. Before !40025 (merged), a dummy container was in place but which was then used to copy if the ROI container exists.

Cheers

added bugfix label

This merge request affects 1 package:

• MuonSpectrometer/MuonValidation/MuonDQA/MuonRawDataMonitoring/TgcRawDataMonitoring

This merge request affects 1 file:

• MuonSpectrometer/MuonValidation/MuonDQA/MuonRawDataMonitoring/TgcRawDataMonitoring/src/TgcRawDataMonitorAlgorithm.cxx

Adding @rosati ,@nkoehler ,@wleight ,@jojungge as watchers

added DQ MuonSpectrometer master review-pending-level-1 labels

added 50 commits

• 285e6da7...1302bdd9 - 48 commits from branch atlas:master
• 2d4d22cd - Remove unneeded caputuring
• becc0cd5 - Merge branch 'master' of ssh://gitlab.cern.ch:7999/atlas/athena into TGC_MonitorCrash

Compare with previous version

This merge request affects 1 package:

• MuonSpectrometer/MuonValidation/MuonDQA/MuonRawDataMonitoring/TgcRawDataMonitoring

This merge request affects 1 file:

• MuonSpectrometer/MuonValidation/MuonDQA/MuonRawDataMonitoring/TgcRawDataMonitoring/src/TgcRawDataMonitorAlgorithm.cxx

Adding @rosati ,@nkoehler ,@wleight ,@jojungge as watchers

CI Result SUCCESS (hash 285e6da7)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis
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
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 27337]

CI Result SUCCESS (hash becc0cd5)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis
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
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 27338]

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

merged

mentioned in commit 6d505732

mentioned in merge request !40252 (merged)

added sweep:ignore label