Bug 27715: Use $dbh->quote_identifier to quote untrusted input

Bug 27715: Use $dbh->quote_identifier to quote untrusted input

The sanitization using regex and \w class of characters might be
enough but given the vast number of unicode characters in \w and
possibility of in the future the database engines interpreting some of
those characters with special meaning it is better to wrap the column
identifier to quotes using $dbh->quote_identifier so it is only
interpreted as identifier and nothing else.

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>