Support multiple nanoAOD versions in one branch

[SimonSPD]

Here is a suggestion on how the sample_database could support multiple nanoAOD versions.

This is now an approach with minimal changes.

Expansion options:

• use a getter method for providing the information in KingMaker (instead of reading the json files)
• this getter method could use a faster database e.g. sqlite

Known issues:

• updated xsec and gen_weights are saved automatically. So the option "exit without save" won't work.

Fixed issues:

• Update genweight only affects datasets.json #26

Adapted KingMaker to use the right path: KIT-CMS/KingMaker#64

[nshadskiy]

KingMaker is now adapted with KIT-CMS/KingMaker#64, right?

[nshadskiy]

Known issues: updated xsec and gen_weights are saved automatically. So the option "exit without save" won't work.

If this is an issue that is not solved in this PR, I suggest to make a real issue in the repository.

[SimonSPD]

KingMaker is now adapted with KIT-CMS/KingMaker#64, right?

Yes

[SimonSPD]

Known issues: updated xsec and gen_weights are saved automatically. So the option "exit without save" won't work.

If this is an issue that is not solved in this PR, I suggest to make a real issue in the repository.

Created issue: #31