Necessary code changes to allow for the use of DD4HEP with FT.
Based on top of !126 (merged)
- Some FIXME's are left to signal potential sources of errors
- Gaudi failures: (Multi)DiGraph has no attribute 'node'
- LHCb: 6 failures, maybe actually OK (they are in the DB loading so it makes sense they should be different)
- Rec: ERROR Cannot retrieve /Event/IOVLockDD4hep from transient store
- Moore: only saw issues with missing countermerger
- Boole: only saw
no valid data at /dd/.../FT. Do not know what it means