Correct syntax to ensure only the one file is deleted

Author: PiJoCoder

samples/features/sql-big-data-cluster/bootstrap-sample-db.sh

@@ -97,7 +97,7 @@ $DEBUG sqlcmd -S $SQL_MASTER_INSTANCE -Usa -P$SQL_MASTER_SA_PASSWORD -I -b -i "$
 
 # remove files copied into the pod:
 echo Removing database backup files...
-$DEBUG kubectl exec $MASTER_POD_NAME -n $CLUSTER_NAMESPACE -c mssql-server -i -t -- bash -c "rm -rvf /var/opt/mssql/data/*.bak"
+$DEBUG kubectl exec $MASTER_POD_NAME -n $CLUSTER_NAMESPACE -c mssql-server -i -t -- bash -c "rm -rvf /var/opt/mssql/data/tpcxbb_1gb.bak"
 
 for table in web_clickstreams inventory customer
     do