ATR-19309: Code changes in b-jet chain defs for supporting HH4b trigger chains
Description: code changes (as minimal as possible) for HH->4b chains in v8 menu. These changes check the chain name has bXX instead bmv2c10XX and imposes a split configuration in a NON-AllTE fashion (AllTE creates chain defs problems). These code changes should only effect these new chains, thus they will keep the b-jet code back-compatible.
Jira: ATR-19309