Bug 21529: (bug 13618 follow-up) Display print notices with HTML tags

Bug 21529: (bug 13618 follow-up) Display print notices with HTML tags

Replace a wrong html filter with raw.

Test plan:
Define a HOLD or DISCHARGE notice template, with html tags.
Generate them and confirm that html tags are displayed (which restore
the existing behaviour prior to bug 13618)

Signed-off-by: Andrew Isherwood <andrew.isherwood@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>