// we will make a new config file here
def newConfig = "";

def configFile = new File("../lib/config.cfg");

def config = configFile.text;

config.eachLine
{
    line->

    if(line.contains("collector.script.threadpool="))
    {
        def tokens = line.split("=");
        newConfig += tokens.first() + "=" + (tokens.last().toInteger() + 5); // Add 5 to the threads.
    }
    else
    {
        newConfig += line + "\n";
    }
}

// newConfig is old one with line changed

configFile.write(newConfig);