Fix options for collision context creation in (old) embedding path (A…

…liceO2Group#1587)

did not take into account first-orbit, which is used in anchoring MC.

MC/bin/o2dpg_sim_workflow.py

@@ -861,7 +861,7 @@ def putConfigValuesNew(listOfMainKeys=[], localCF = {}):
    # The :r flag means to shuffle the background events randomly
    if doembedding:
       ContextTask['cmd'] += ';ln -nfs ../bkg_Kine.root .;${O2_ROOT}/bin/o2-steer-colcontexttool -i bkg,' + str(INTRATE) + ',' + str(args.ns) + ':' + str(args.nb) + ' ' + signalprefix + ',' + args.embeddPattern + ' --show-context ' + ' --timeframeID ' + str(tf-1 + int(args.production_offset)*NTIMEFRAMES) + ' --orbitsPerTF ' + str(orbitsPerTF) + ' --use-existing-kine'
-      ContextTask['cmd'] += ' --bcPatternFile ccdb --seed ' + str(TFSEED)
+      ContextTask['cmd'] += ' --bcPatternFile ccdb --seed ' + str(TFSEED) + ' --orbits ' + str(orbitsPerTF) + ' --noEmptyTF --first-orbit ' + str(args.first_orbit)
 
    workflow['stages'].append(ContextTask)