TrkExStraightLineIntersector: Preparing to make interfaces const.

The tool was caching event information in member variables. Rework to remove this caching, to allow the interfaces to eventually be made const. Results are identical, and this is not expected to have any significant effect on performance.

Also changed CRLF line endings to LF.

This merge request affects 1 package:

• Tracking/TrkExtrapolation/TrkExStraightLineIntersector

added Tracking master review-pending-level-1 labels

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-20676-2019-01-27-03-50
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
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merged

mentioned in commit 09845f0f

added sweep:ignore label