Temporary fix: add DD4hep and LCIO from layer 6
@gcorti This has been extracted from !21 (comment 4571656) as these changes are only temporary since DD4hep and LCIO are missing in the LHCB_LAYER6
Edited by Michal Mazurek
@gcorti This has been extracted from !21 (comment 4571656) as these changes are only temporary since DD4hep and LCIO are missing in the LHCB_LAYER6