Allow using run_java without the arguments from -J -Ja -Jp. Factor out the argument processing of mx_graal.vm and use it to pass tested-vm args down through the jmh harness

function main() {  
  i = 0;  
  sum = 0;  
  while (i <= 10000) {  
    sum = sum + i;  
    i = i + 1;  
  }  
  return sum;  
}