More UL updates

• Fix some samples, update some to nanoV9. @kcormier I think we can now synchronize this list with your Rucio container. It will just need to be re-synchronized when the missing samples are there.
• Fix implementation of on-the-fly JEC/JER systematics
• Small fixes for the lepton SF systematics (temporary, until the central JSONs are fixed)
• Disable everything related to MET (not used)
• Update Muon Rochester correction files for UL; re-enable on-the-fly correction
• Move to jsonPOG format for b-tagging scale factors; add argument to choose between fixedWP (default, with weight computed for two working points, M and T), and iterativeFit
• Add loose jet PUID
• Remove old iterativeFit patches
• Remove old scale factors from the repository
• Fix goldenJSON for 2016 data
• Update skimmer module used for synchronization (needed some re-organization of base analysis module hierarchy, should be transparent for other modules)