Use LCRelationNavigator to get "from" and "to" parameters

[fdplacido]

When trying to convert LCIO collections generated by DDPlanarDigiProcessor, LCRelationImpl won't generate the "from" and "to" parameters for TrackerHitPlane and SimTrackerHit relation.

BEGINRELEASENOTES

• DDPlanarDigiProcessor: Add setting of the fromType and toType parameters for the LCRelation collection between TrackerHit and SimTrackerHit

ENDRELEASENOTES

[andresailer]

Looks good to me

[andresailer]

Please rebase to get the CI builds