PersistentDataModel+PersistentDataModelTPCnv+EventSelectorAthenaPool: Prepare for possible migration to 64-bit sgkey_t.

Use sgkey_t typedef rather than hardcoding the type.

assigned to @ssnyder

This merge request affects 3 packages:

• Database/AthenaPOOL/EventSelectorAthenaPool
• Database/PersistentDataModel
• Database/PersistentDataModelTPCnv

Affected files list will not be printed in this case

Adding @tadej ,@mnowak ,@ssnyder as watchers

added Database master review-pending-level-1 labels

CI Result SUCCESS (hash 49f49ecf)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
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 57018]

removed review-pending-level-1 label

added review-approved label

merged

mentioned in commit 64fec0de

added sweep:ignore label