Uniqueness checking fixes for typeless TC adds

Spotted by @tamartin on old MR, but was pre-cleanup. Fixing now.

Added ctests for the typeless add method as well.

added 1 commit

• 65f6f42e - Added tests for the typeless links

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added 1 commit

• 408cc85d - Removed a variable I didn't need

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unmarked as a Work In Progress

changed the description

This merge request affects 1 package:

• Event/xAOD/xAODTrigger

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

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-20043-2018-12-20-00-16
Athena: number of compilation errors 0, warnings 3
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST 31743] (for remote access see the FAQ for MR reviewers)

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

merged

mentioned in commit ba48e037

added sweep:ignore label