Fixes bug #9512 : pdf merge fails on encrypted PDFs. Try to use qpdf to decrypt.

3 jobs for B9512pdfMergeFails in 2 minutes and 47 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Before
passed documentation #3754

00:00:41

 
  Build
passed snapshot #3755

00:01:23

 
  Selenium
passed selenium #3756

00:00:42