FPGATrackSimHough: Fix cppcheck 2.14 warnings.
Copying values in range-for. Prefer returning const references to members rather than copies. Prefer to pass strings/containers by const reference rather than value. Redundant map lookup.
Copying values in range-for. Prefer returning const references to members rather than copies. Prefer to pass strings/containers by const reference rather than value. Redundant map lookup.