Make methods of SiSpacePointsSeedMaker_ITK const by defining EventData to hold event dependent data. (ATLASRECTS-3037)

Make methods of SiSpacePointsSeedMaker_ITK const by defining EventData to hold event dependent data.

• Define and use EventData to hold event dependent data.
• Implement event cache.
• Make methods const

These are important to run SiSPSeededTrackFinder in multi-threads.

• emplace_back is used instead of push_back if possible in SiSpacePointsSeedMaker_Cosmic and SiSpacePointsSeedMaker_HeavyIon. This is followup of MR !23322 (merged).

MR !23244 (merged) contains the corresponding changes to SiSpacePointsSeedMaker_ATLxk.

This merge request affects 1 package:

• InnerDetector/InDetRecTools/SiSpacePointsSeedTool_xk

added InnerDetector master review-pending-level-1 labels

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-23351-2019-05-11-21-12
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST 38329]

added review-pending-level-2 label and removed review-pending-level-1 label

added review-approved label and removed review-pending-level-2 label

merged

mentioned in commit e5bd81d6

added sweep:ignore label

changed title from Make methods of SiSpacePointsSeedMaker_ITK const by defining EventData to hold event dependent data. to Make methods of SiSpacePointsSeedMaker_ITK const by defining EventData to hold event dependent data. (ATLASRECTS-3037)

changed the description