Draft: Turbo B2emu lines bug fix (hackathon)

Bug fixes on

B->emu turbo lines

B-> e+ mu-: line change decay descriptor to have Bs_0 head particle B-> e+ mu+: line change decay descriptor to have Bs_0 head particle + actual forwarding of same_sign flag to builders

Hlt/Hlt2Conf/python/Hlt2Conf/lines/rd/builders/b_to_ll_builders.py

@@ -133,6 +133,7 @@ def filter_B2MuE(name="filter_RD_BToMuE",
     pvs = make_pvs()
     emu = make_rd_detached_mue(
         name="rd_detached_mue_for_B2mue",
+        parent_id=parent_id,
         max_dilepton_mass=max_mass,
         min_probnn_mu=min_probnn_mu,
         min_PIDe=min_PIDe,
@@ -140,7 +141,7 @@ def filter_B2MuE(name="filter_RD_BToMuE",
         min_pt_mu=min_pt_track,
         min_bpvvdchi2=min_bpvvdchi2,
         max_vchi2ndof=max_vchi2ndof,
-        same_sign=False)
+        same_sign=same_sign)
     code = F.require_all(
         F.BPVIPCHI2(pvs) < max_ipchi2_emu, F.PT > min_pt_emu,
         F.BPVDIRA(pvs) > min_DIRA_emu, F.MASS > min_mass)