[Anchor] Take MCANCHOR if exists (e.g. from JDL)

MC/run/ANCHOR/anchorMC.sh

@@ -106,8 +106,8 @@ export ALIEN_JDL_ANCHOR_SIM_OPTIONS=${ALIEN_JDL_ANCHOR_SIM_OPTIONS:--gen pythia8
 export ALIEN_JDL_LPMANCHORPASSNAME=${ALIEN_JDL_LPMANCHORPASSNAME:-${ANCHORPASSNAME}}
 # LPMPASSNAME is used in O2 and O2DPG scripts, however on the other hand, ALIEN_JDL_LPMANCHORPASSNAME is the one that is set in JDL templates; so use ALIEN_JDL_LPMANCHORPASSNAME and set ALIEN_JDL_LPMPASSNAME
 export ALIEN_JDL_LPMPASSNAME=${ALIEN_JDL_LPMANCHORPASSNAME}
-# For Hyperloop, this is used and it is also still accessed as such in o2dpg_sim_workflow.py
-export ALIEN_JDL_MCANCHOR=${ALIEN_JDL_LPMANCHORPASSNAME}
+# ALIEN_JDL_MCANCHOR comes from the JDL and it is used in Hyperloop. It is also used to tag the produced AODs in o2dpg_sim_workflow.py
+export ALIEN_JDL_MCANCHOR=${ALIEN_JDL_MCANCHOR:-${ALIEN_JDL_LPMANCHORPASSNAME}}
 export ALIEN_JDL_LPMRUNNUMBER=${ALIEN_JDL_LPMRUNNUMBER:-${RUNNUMBER}}
 export ALIEN_JDL_LPMPRODUCTIONTYPE=${ALIEN_JDL_LPMPRODUCTIONTYPE:-${PRODUCTIONTYPE}}
 export ALIEN_JDL_LPMINTERACTIONTYPE=${ALIEN_JDL_LPMINTERACTIONTYPE:-${INTERACTIONTYPE}}