Fix DoubleEventSelector with ByteStream when primary POOL input contains non-empty AttributeList

Fix DoubleEventSelector with ByteStream when primary POOL input contains non-empty AttributeList. The solution is just not to copy it as BS is treated as primary in this context (although it's secondary due to technical reasons).

/cc @jchapman @gemmeren

added bugfix label

This merge request affects 1 package:

• Database/AthenaPOOL/EventSelectorAthenaPool

This merge request affects 1 file:

• Database/AthenaPOOL/EventSelectorAthenaPool/src/DoubleEventSelectorAthenaPool.cxx

Adding @tadej ,@mnowak ,@ssnyder as watchers

added Database master review-pending-level-1 labels

CI Result SUCCESS (hash 21d0eae4)

	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 48901]

added Overlay label

code changes look fine, CI passed, approving.

Roman(L1)

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

merged

mentioned in commit e8a3a6ca

added sweep:ignore label