Removed UlePdfBundle routes from routing files

Since we transform this controller into a service we no longer need the
routes for generating pdfs from the browser
Rename $type variable because it was confusing

Before turning this controller into a Service we fix some naming issues
New service for application-wide generation of pdfs

We turn the old UlePdfBundle:DefaultController into a service for easily
generating pdfs from anywhere
Now in Cost Center listing the billingEmails field is sortable
Modified controllers for calling the new pdf service

Instead of redirecting the request to the old Pdf Controller, now we
generate the pdf by calling a service and treating the response from
the caller controller, which is cleaner and more reusable
New console command for sending cost center invoices via e-mail