Testing

// Read CSV from Resource Element

var csvContent = csvResource.getContentAsMimeAttachment().content;

// Convert bytes to string

var csv = csvContent;

// Split into lines

var lines = csv.split("\n");

// Create Properties object

var props = new Properties();

// Skip header row

for (var i = 1; i < lines.length; i++) {

    var line = lines[i].replace("\r", "");

    if (line == "") {

        continue;

    }

    var columns = line.split(",");

    var hostname = columns[0].trim();

    var password = columns[1].trim();

    props.put(hostname, password);

    System.log("Added : " + hostname);

}

// Update Configuration Element

configElement.setAttributeWithKey("hostPasswords", props);

System.log("Import completed.");