HLT Menu&CF: fix ERROR on duplicated sequences when using EmptyMenuSequences

Fixing ERRORs in the log files of this type: Py:Configurable ERROR attempt to add a duplicate (merged_Step3_Step3_1mu31_leg1_EmptySeqStep3.IMmerged_Step3_Step3_1mu31_leg1_EmptySeqStep3) ... dupe ignored

Also made some cleanup for debugging purpose

This merge request affects 3 packages:

• Trigger/TrigValidation/TrigUpgradeTest
• Trigger/TriggerCommon/TriggerJobOpts
• Trigger/TriggerCommon/TriggerMenuMT

Adding @okumura ,@bernius ,@jpanduro as watchers

added Trigger TriggerMenu master review-pending-level-1 labels

changed the description

CI Result SUCCESS (hash bc44bf3c)

	Athena	AthSimulation	AnalysisBase	AthGeneration
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
AnalysisBase: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 17277]

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

The changes seem sensible to me, approving.

Jon (L1)

merged

mentioned in commit 57171502

added sweep:ignore label