This should fix the immediate issue reported privately by @jcatmore. In the CA-based MP derivation jobs, LumiBlockMetaDataTool causes the jobs to crash (which is a showstopper for physics validation). It looks like in the old-style config, we use CreateLumiBlockCollectionFromFile algorithm instead in MP jobs. Here we mimic that to fix the immediate issue but the whole MetaData setup in CA-based configuration needs to be cleaned up.