fix in track propagation to TOF for MC

[noferini]

This is to fix an issue for missing piece in track length for TOF.
For the moment it is applied only to MC since for DATA old calibrations have to be adjusted before to apply the fix

watchers: @chiarazampolli @njacazio @ercolessi

[github-actions]

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[noferini]

Hi @shahor02 ,
I started the review of this PR but I didn't mark it for Pb-Pb apass1. As discussed for the moment this is needed only for MC (mainly for other data passes and in view of QM approvals).
I tested it and both results and cpu performances are fine (CPU time unchanged).
... waiting for your review
Cheers,
Francesco

[shahor02]

@noferini thanks, looks good, shall I merge it already?

[noferini]

Hi @shahor02
thanks!
I think it can be merged, since RelVal is already running and I assume this will not enter in Pb-Pb apass1 reco.
Let's wait also for a confirmation by @chiarazampolli or @alcaliva

[chiarazampolli]

Thanks, merged.
We might cherry-pick this one or tag from the daily of 17.12 (where it will be included).