Create a function for converting output to CSV for sysbench and ycsb

Function should be placed in modules/compute_set/lib/default.sh. It only needs to output all the contents of a file to CSV. No aggregation is needed. Final results can be uploaded into a different file.

Possible conventions:

# Prefered:
function convertToCSV {
  tool=$(getTag Tool)
  # $1: file to process


  if [ $tool == "sysbench"] ;then
    ...
  elif [ $tool == "ycsb" ]
}

The output should be placed in a local folder with all the results.