Adding default value for FST_BFIELD as "ccdb"

Author: ChSonnabend

prodtests/full_system_test.sh

@@ -59,6 +59,7 @@ FIRSTSAMPLEDORBIT=${FIRSTSAMPLEDORBIT:-0}
 OBLIGATORYSOR=${OBLIGATORYSOR:-false}
 FST_TPC_ZSVERSION=${FST_TPC_ZSVERSION:-4}
 TPC_SLOW_REALISITC_FULL_SIM=${TPC_SLOW_REALISITC_FULL_SIM:-0}
+FST_BFIELD="${FST_BFIELD:-}ccdb"
 if [[ $BEAMTYPE == "PbPb" ]]; then
   FST_GENERATOR=${FST_GENERATOR:-pythia8hi}
   FST_COLRATE=${FST_COLRATE:-50000}