TrackingGeometry: Use CONDCONT_MIXED_DEF

Walter Lamplrequested to merge
wlampl/athena:TrkGeoMixedRange into master

TrackingGeometry depends on both, RunLB- and timestamp-idexed input condtions. Use CONDCONT_MIXED_DEF

cc @rlangenb

Edited by Walter Lampl

Merge request reports