Production data file and dataset name conventions don't allow heterogeneous datasets

[brownd1978]

Current Mu2e file and dataset name conventions require that the configuration fields of those match exactly. This precludes datasets formed of files that have equivalent but different configurations, ie if they were produced using different versions of the database. A more flexible dataset naming convention which allows heterogeneous files, and tools to create those in a consistent and correct manner, are needed.

[rlcee]

SAM dataset definitions are the obvious tool for this. Still plenty of details to work out.