Fix VP1 TrackingGeometry import for the Extrapolator
This MR fixes the VP1 use of the -mc flag to load MC data, by fixing the import of the AtlasTrackingGeometrySvc for the ExtrapolationEngine.
It closes https://its.cern.ch/jira/browse/ATLASVPONE-615
A note: the dependency on the ExtrapolationEngine should be removed, following ATLASRECTS-7277 , but that will be the target of a separate MR, later.
Edited by Riccardo Maria Bianchi