Split OOA and b-fragmentation
- Split the signal and the OOA background into ttb and ttbb. This unfortunately requires editing the samples file (luckily, in a single place)
- Add the b-fragmentation systematic as a 1% simultaneous variation of all gen and reco level jets with hadronFlavour=5. This required a small hack to bamboo itself, to be able to add variations to the reco-level jets on top of those already present from the JEC/JER. I'll make a PR for that soon.