TrigSerializeResult: Use WithRootErrorHandler.

Use WithRootErrorHandler to change the root error handler, for better thread-safety.

See ATEAM-715.

This merge request affects 1 package:

• Trigger/TrigDataAccess/TrigSerializeResult

This merge request affects 3 files:

• Trigger/TrigDataAccess/TrigSerializeResult/CMakeLists.txt
• Trigger/TrigDataAccess/TrigSerializeResult/src/TrigTSerializer.cxx
• Trigger/TrigDataAccess/TrigSerializeResult/src/TrigTSerializer.h

added Trigger master review-pending-level-1 labels

CI Result SUCCESS (hash 5cf5648f)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
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
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 30075]

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

merged

mentioned in commit 1d5ed211

added sweep:ignore label