fixes if boerse.de is down

dabo/functions/get_boerse_de.sh

@@ -20,7 +20,6 @@ function get_boerse_de {
   fi
   if ! [ -e "BOERSE_DE_CMD_OUT-${f_name}" ]
   then
-    set -x
     local f_old_value=$(tail -n 1 asset-histories/${f_name}.history.csv | cut -d, -f2)
     if echo ${f_old_value} | egrep -q "^[0-9]*\.[0-9]+$"
     then
@@ -28,7 +27,6 @@ function get_boerse_de {
     else
       echo 0 >BOERSE_DE_CMD_OUT-${f_name}
     fi
-    set +x
   fi
   echo "${f_timestamp},$(cat BOERSE_DE_CMD_OUT-${f_name})" >>asset-histories/${f_name}.history.csv
 }