CRM-13428 - Changed other instances of the event confirmation PDF filename to confirmation.pdf from eventReceipt.pdf.

----------------------------------------
* CRM-13428: Email receipt/confirmation do not attach PDF files
  http://issues.civicrm.org/jira/browse/CRM-13428
Merge pull request #1679 from davecivicrm/CRM-13428

CRM-13428 - Changed other instances of the event confirmation PDF filena...