message: Replace hard-coded application name
  with configured value on order confirmation PDF
diff: @@ -6,6 +6,7 @@ const insecurity = require('../lib/insecurity')
  const models = require('../models/index')
  const products = require('../data/datacache').products
  const challenges = require('../data/datacache').challenges
  +const config = require('config')
  exports = module.exports = function placeOrder () {
  return (req, res, next) => {
  @@ -19,7 +20,7 @@ exports = module.exports = function placeOrder () {
  const doc = new PDFDocument()
  const fileWriter = doc.pipe(fs.createWriteStream(path.join(__dirname, '../ftp/', pdfFile)))
  - doc.text('Juice-Shop - Order Confirmation')
  + doc.text(config.get('application.name') + ' - Order Confirmation')
  doc.moveDown()
  doc.moveDown()
  doc.moveDown()
  