Switch to from_file=False for hlt2_all_lines test
This is to avoid huge piles of warning of LHCb__SelectivePacker_4a6422c5 WARNING Null Track SmartRef in '/Event/Rec/Vertex/Primary'
due to pv_tracks=true
tag in HLT2 lines.
When using reconstruction from old brunel files with from_file=True, the unpacking is done using different algorithms than what we use for Moore output. While new unpackers can unpack all dependencies, old unpackers require dependencies to be unpacked explicitly. In this particular case, tracks in the PV are not unpacked but requested to be packed with PVs when pv_tracks=True.
Providing a proper fix will take time and not clear if it's worth it, so this should fix the tests for now.
Edited by Sevda Esen