Add LinearStateZTraj.h to Tr/TrackKernel (cherry-pick from !1082 to strpping21-patches)

Carlos Vazquez Sierrarequested to merge
cherry-pick-452f3f35 into stripping21-patches

Added LinearStateZTraj.h to Tr/TrackKernel

See merge request !1082 (merged)

(cherry picked from commit 452f3f35)

f3941e82 added LinearStateZTraj.h

Edited by Carlos Vazquez Sierra

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