Fixing the recipe

- patDefaultSequence removed
- ad-hoc fix to patJets.discriminatorSources removed
- default PAT collections are replaced with PFlow ones in the EventFilter, as even with 'noskim' option on, it loads the collections to apply '-1' cuts on them. Perhaps we need to reconsider this — the skimming shouldn't be executed at all with 'noskim' option turned on. This doesn't affect our normal 'LeptonPlusJets' skims.
- photons are no longer stored as they are PAT objects; we don't need them anyway