Fix lambda1405 generator

Author: Francesco Mazzaschi

MC/config/PWGLF/ini/GeneratorLFSigmaPiResonances.ini

@@ -1,6 +1,9 @@
 [GeneratorExternal]
-fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator_pythia8_LF.C
-funcName=generateLF("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/sigmapi_resonances_gun.json", true, 4)
+fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator_pythia8_LF_rapidity.C
+funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/sigmapi_resonances_gun.json", true, 4, false, true, "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg", "")
+
+[GeneratorPythia8] # if triggered then this will be used as the background event
+config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg
 
 [DecayerPythia8] # after for transport code!
 config[0]=${O2DPG_MC_CONFIG_ROOT}/MC/config/common/pythia8/decayer/base.cfg