Tracking iteration names changed to match iteration Python labels

https://twiki.cern.ch/twiki/bin/viewauth/CMS/TrackingIterationRenaming
I mean a developer does not wait for jenkins to find out what the "regression" is but thanks for the hint about jenkins. "Initiated this work, supervised it and approved" is a more serious answer, could you also put some links (in the description in the PR preferably). Is this the twiki, https://twiki.cern.ch/twiki/bin/viewauth/CMS/TrackingIterationRenaming, you are talking about - the only one mention in this PR anyway? Nothing about expected consequences is described there.