Update conflicting DFCommonTrackSelection configs between JETM1 and JETM6

Fix issue observed in DerivationFrameworkTrainsART when running JETM1 and JETM6 simultaneously

https://bigpanda.cern.ch//media/filebrowser/b384793b-9db4-430c-87b1-94cb1392ab42/group.art/tarball_PandaJob_5946162801_CSCS-LCG2/log.Derivation

09:01:55 ValueError: conflicting settings for property DecorationName of DFCommonTrackSelectionLoose: cannot merge values DataHandle('DFJETM6Loose','W','DataVector<xAOD::TrackParticle_v1,DataVector<xAOD::IParticle,DataModel_detail::NoBase> >') and DataHandle('DFJETM1Loose','W','DataVector<xAOD::TrackParticle_v1,DataVector<xAOD::IParticle,DataModel_detail::NoBase> >')

Since the configuration of the decoration tool is actually identical, I think it would actually even make sense to use the same decoration name in the two cases but this seems to conflict with the developments ongoing as part of https://its.cern.ch/jira/browse/ATEAM-909 so just going for this minimal update here.

FYI @cdelitzs @mswiatlo