rare baryonic lines

This is the v0 of the rare baryonic b->sll transitions, for now only the simplest channels.

Rates on the minbias sample:
HLT rates:
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Line:    Hlt2RD_OmegabmToOmegamEE_DDD_LineDecision       Incl: 0.13348461589801777 +/- 0.09 kHz, Excl: 0.13348461589801777 +/- 0.09 kHz
Line:    Hlt2RD_OmegabmToOmegamEE_DDL_LineDecision       Incl: 0.0  +/- 0.0  kHz, Excl: 0.0  +/- 0.0  kHz
Line:    Hlt2RD_OmegabmToOmegamEE_LLL_LineDecision       Incl: 0.0  +/- 0.0  kHz, Excl: 0.0  +/- 0.0  kHz
Line:    Hlt2RD_OmegabmToOmegamMuMu_DDD_LineDecision     Incl: 0.13348461589801777 +/- 0.09 kHz, Excl: 0.13348461589801777 +/- 0.09 kHz
Line:    Hlt2RD_OmegabmToOmegamMuMu_DDL_LineDecision     Incl: 0.06674230794900889 +/- 0.06 kHz, Excl: 0.0  +/- 0.0  kHz
Line:    Hlt2RD_OmegabmToOmegamMuMu_LLL_LineDecision     Incl: 0.06674230794900889 +/- 0.06 kHz, Excl: 0.0  +/- 0.0  kHz
Line:    Hlt2RD_XibmToXimEE_DDD_LineDecision             Incl: 0.06674230794900889 +/- 0.06 kHz, Excl: 0.06674230794900889 +/- 0.06 kHz
Line:    Hlt2RD_XibmToXimEE_DDL_LineDecision             Incl: 0.0  +/- 0.0  kHz, Excl: 0.0  +/- 0.0  kHz
Line:    Hlt2RD_XibmToXimEE_LLL_LineDecision             Incl: 0.0  +/- 0.0  kHz, Excl: 0.0  +/- 0.0  kHz
Line:    Hlt2RD_XibmToXimMuMu_DDD_LineDecision           Incl: 0.0  +/- 0.0  kHz, Excl: 0.0  +/- 0.0  kHz
Line:    Hlt2RD_XibmToXimMuMu_DDL_LineDecision           Incl: 0.0  +/- 0.0  kHz, Excl: 0.0  +/- 0.0  kHz
Line:    Hlt2RD_XibmToXimMuMu_LLL_LineDecision           Incl: 0.0  +/- 0.0  kHz, Excl: 0.0  +/- 0.0  kHz
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Hlt2 Total:                                             Rate:    0 +/- 0.2 kHz
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