The new API migration was made to @api.multi because of the "cr, uid,
ids" signature, but "ids" was the ids of the records to print here, not
the report's ids.
Also, the new API version of "get_pdf" get directly the ids of the
records to print in the standard module, not a recordset.
* [IMP] Updated unit tests
* [FIX] Fixed renamed attributes
* [FIX] Remove deleted fields
* [IMP] Add printing.server and printing.job models
* [IMP] Allow to cancel all jobs, enable, and disable printers
* [IMP] Split the cups part of print_document into a new print_file method
* [IMP] Updated cron job to run the action_update_jobs method
* [ADD] Add a migration script to create a printing server from configuration
